Properties of the Number 64974

Sixty-Four Thousand Nine Hundred Seventy-Four

Basics

Value: 64973 → 64974 → 64975

Parity: even

Prime: No

Previous Prime: 64969

Next Prime: 64997

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 ² × 13 × 17

Divisors: 1, 2, 3, 6, 7, 13, 14, 17, 21, 26

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110111001110

Octal: 176716

Duodecimal: 31726

Hexadecimal: fdce

Square: 4221620676

Square Root: 254.89998038446373

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

Triangle of coefficients of characteristic polynomial of negative Pascal matrix with (i,j)-th entry -C(i+j-2,i-1). A45912

T(n+2,2) from table A045912 of characteristic polynomial of negative Pascal matrix. A6135

Expansion of (1+x⁴*C⁴)*C², where C = (1-(1-4·x)^1/2)/(2·x) is g.f. for Catalan numbers, A000108. A71755

Number of walks within N² (the first quadrant of Z²) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1), (1, 1)}. A151490

a(n) = ∑_i=1..n C(i+6,7)². A86029

Numbers k such that k-1, k-3, k-7 and k-9 are all prime. A64974