Properties of the Number 42997

Forty-Two Thousand Nine Hundred Ninety-Seven

Basics

Value: 42996 → 42997 → 42998

Parity: odd

Prime: No

Previous Prime: 42989

Next Prime: 43003

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 19 × 31 × 73

Divisors: 1, 19, 31, 73, 589, 1387, 2263, 42997

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011111110101

Octal: 123765

Duodecimal: 20A71

Hexadecimal: a7f5

Square: 1848742009

Square Root: 207.35717976477207

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

Composite squarefree numbers n such that the ratio (n + 1/2)/(p(i) + 1/2) is an integer, where p(i) are the prime factors of n. A226020

Integers that reach the (47360, 29127) cycle described in A234534, after iterations of numerator(σ(n)/n) = A017665(n). A249614

Consecutive states of the linear congruential pseudo-random number generator (1277·s + 24749) mod 117128 when started at s=1. A385357

E.g.f. A(x) satisfies A(A(x)) = tan(x), where A(x) = ∑_n>=1 a(n)*x^2n-1/(2n-1)!. A72350

Smallest a(n)>a(n-1) such that a(n)²+a(n-1)² is a perfect square, a(1)=11. A76676

Unimodal analog of binomial coefficient, such that A071921(n,m) = a(n+m-1,n) for all (n,m) different from (0,0), arranged in a Pascal-like triangle. A71922

Primes congruent to {2, 3, 4, 5, 6} (mod 7). A42997

Primes expressible as the sum of (at least two) consecutive primes in at least 7 ways. A350335