Properties of the Number 61440

Sixty-One Thousand Four Hundred Forty

Basics

Value: 61439 → 61440 → 61441

Parity: even

Prime: No

Previous Prime: 61417

Next Prime: 61441

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ¹² × 3 × 5

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111000000000000

Octal: 170000

Duodecimal: 2B680

Hexadecimal: f000

Square: 3774873600

Square Root: 247.8709341572747

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

a(n) = (n+2)*2^n-1. A1792

Numbers j such that σ(σ(j)) = k·j for some k. A19278

Jordan function J₄(n). A59377

14-almost primes (generalization of semiprimes). A69275

Floor-factorial numbers: a(n) = ∏_k=1..n floor(n/k). A10786

Smallest number with 2n divisors. A3680

Number of inseparable multisets of size n covering an initial interval of positive integers. A336102

8th binomial transform of (0,0,1,0,0,0, ...). A81138

a(n) = 15·2ⁿ. A110286

Number of multisets of size n that have no alternating permutations and cover an initial interval of positive integers. A349050