Properties of the Number 71253

Seventy-One Thousand Two Hundred Fifty-Three

Basics

Value: 71252 → 71253 → 71254

Parity: odd

Prime: No

Previous Prime: 71249

Next Prime: 71257

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 7 × 13 × 29

Divisors: 1, 3, 7, 9, 13, 21, 27, 29, 39, 63

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011001010101

Octal: 213125

Duodecimal: 35299

Hexadecimal: 11655

Square: 5076990009

Square Root: 266.93257575650074

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Tritriangular numbers: a(n) = binomial(binomial(n,2),2) = n*(n+1)*(n-1)*(n-2)/8. A50534

a(n) = binomial(Fibonacci(n) + 1, 2). A33192

Alkane (or paraffin) numbers l(8,n). A5995

Number of reversible strings with n-1 beads of 2 colors. 5 beads are black. String is not palindromic. A32092

a(n)*a(n-11) = a(n-1)*a(n-10)+a(n-5)+a(n-6) with initial terms a(1)=...=a(11)=1. A133848

One half of binomial coefficients C(2·n-4,5). A53132

Numbers k divisible by at least one nontrivial permutation (rearrangement) of the digits of k, excluding all permutations that result in digit loss. A90056

Triangular numbers such that the product of digits is also a (positive) triangular number. A69077

Indices of the start of 10 successive distinct digits in the decimal expansion of e (2.718281828...). A258166

Number of n-element subsets of [n+5] having an even sum. A282081