15454
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 23184
- Proper Divisor Sum (Aliquot Sum)
- 7730
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7726
- Möbius Function
- 1
- Radical
- 15454
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 89
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers k such that 97*2^k+1 is prime.at n=12A032398
- Numbers k such that k^6 == 1 (mod 7^4).at n=38A056092
- Numbers k such that k^6 == 1 (mod 7^5).at n=4A056103
- Semidiagonal sums of triangle A104978: a(n) = Sum_{k=0..[n/2]} A104978(n-k,n-2*k).at n=7A104979
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.at n=7A150972
- Semiprime centered triangular numbers.at n=38A184481
- Approximations up to 7^n for one of the three 7-adic integers (-1)^(1/3).at n=5A212153
- Walks of length n on the x-axis using steps {1,-1} and visiting no point more than twice.at n=25A212585
- Number of partitions of n into distinct parts with boundary size 6.at n=47A227563
- Numbers k such that distances from k to three nearest squares are three triangular numbers.at n=20A232501
- Numbers k such that (11*10^k - 113) / 3 is prime.at n=19A280557
- Semiprime numbers whose digit string can be partitioned into three parts such that the product of the first two parts equals the third part.at n=35A280636
- Column 4 of A060244.at n=25A291589
- Number of set partitions of [5n] into 5-element subsets {i, i+k, i+2k, i+3k, i+4k} with 1<=k<=n.at n=12A349430
- Squarefree semiprimes that are centered triangular numbers.at n=35A380913