Properties of the Number 64420

Sixty-Four Thousand Four Hundred Twenty

Basics

Value: 64419 → 64420 → 64421

Parity: even

Prime: No

Previous Prime: 64403

Next Prime: 64433

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 3221

Divisors: 1, 2, 4, 5, 10, 20, 3221, 6442, 12884, 16105

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1111101110100100

Octal: 175644

Duodecimal: 31344

Hexadecimal: fba4

Square: 4149936400

Square Root: 253.81095327034254

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

Successively larger gaps in Ulam numbers start at this Ulam number. A80287

a(n) = least positive integer m such that m*(m+1) has n-2 distinct digits in base n, all distinct from those (base-n digits) of m and m+1. A381248

a(n) in base 11 is a repdigit. A48335

Number of (n+2) X 9 0..1 matrices with each 3 X 3 subblock idempotent. A224558

Number of unlabeled mating graphs with n nodes and a degenerate adjacency matrix. A133279

Ulam numbers: a(1) = 1; a(2) = 2; for n>2, a(n) = least number > a(n-1) which is a unique sum of two distinct earlier terms. A2858

Table read by antidiagonals: T(n,k) (n >= 3, k >= 0) is the number of cells in a regular n-gon after k generations of mitosis. A350000

Numbers k such that A064413(k+1) = k. Probably complete. A64420