Properties of the Number 61220

Sixty-One Thousand Two Hundred Twenty

Basics

Value: 61219 → 61220 → 61221

Parity: even

Prime: No

Previous Prime: 61211

Next Prime: 61223

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 3061

Divisors: 1, 2, 4, 5, 10, 20, 3061, 6122, 12244, 15305

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1110111100100100

Octal: 167444

Duodecimal: 2B518

Hexadecimal: ef24

Square: 3747888400

Square Root: 247.42675683927152

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

Cubic star numbers: a(n) = n³ + 4*∑_i=0..n-1 i². A51673

Numbers j > 1 at which the absolute difference between log(j)*log(A341651(j)) and the nearest integer reaches a record low. A341652

E.g.f. satisfies A(x) = (1 + x·exp(x·A(x)))⁴. A377579

Sum of the products of the first n prime pairs. A135232

Numbers k for which k = φ(k') + φ(k''), where φ is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346). A352332

Least entry in character table of the symmetric group S_n. A61220