Properties of the Number 61439

Sixty-One Thousand Four Hundred Thirty-Nine

Basics

Value: 61438 → 61439 → 61440

Parity: odd

Prime: No

Previous Prime: 61417

Next Prime: 61441

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 × 67 × 131

Divisors: 1, 7, 67, 131, 469, 917, 8777, 61439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111111111111

Octal: 167777

Duodecimal: 2B67B

Hexadecimal: efff

Square: 3774750721

Square Root: 247.86891697024055

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

Number of non-knapsack integer partitions of n. A366754

a(n) = (n+3)*2ⁿ - 1. A6589

Numbers which contain only the digit 3 in their base-4 representation, with at most one exception. If the exception is the most-significant digit, it must be the digit 1 or 2, otherwise the exception must be the digit 2. A188529

a(n) = 15·2ⁿ - 1. A196305

a(1)=1, a(n) = ceiling(r(3)*a(n-1)) where r(3) = (1/2)*(3 + sqrt(13)) is the positive root of X² = 3·X + 1. A82574

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 205", based on the 5-celled von Neumann neighborhood. A279825

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 950", based on the 5-celled von Neumann neighborhood. A284481

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 347", based on the 5-celled von Neumann neighborhood. A287752

Smallest m such that A199238(m) = n. A199262

Least m which can be written as i·j+i+j in n different ways: A072670(m)=n. A72671