Properties of the Number 30121

Thirty Thousand One Hundred Twenty-One

Basics

Value: 30120 → 30121 → 30122

Parity: odd

Prime: No

Previous Prime: 30119

Next Prime: 30133

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 7 × 13 × 331

Divisors: 1, 7, 13, 91, 331, 2317, 4303, 30121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111010110101001

Octal: 72651

Duodecimal: 15521

Hexadecimal: 75a9

Square: 907274641

Square Root: 173.5540261705271

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

Euler pseudoprimes: composite numbers n such that 2^(n-1/2) == +-1 (mod n). A6970

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713

Composite numbers k such that k == +-1 (mod 8) and 2^(k-1/2) == 1 (mod k). A6971

Sarrus numbers A001567 that are not Carmichael numbers A002997. A153508

Number of vertices formed in a square by straight line segments when connecting the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on the edge on the opposite side of the square. A355799

Composite integers k such that 2^k == 2 (mod k*(k+1)). A217465

Composite numbers k == 1 (mod 4) such that (1 + i)^k == 1 + i (mod k), where i = sqrt(-1). A270698

Expansion of (1 - x - x⁴)/((1 - x - x⁴)² - 4·x⁵). A375282

Fermat pseudoprimes to base 2 with three prime factors. A215672

Composite numbers k which divide A001045(k-1). A66488