Properties of the Number 40487

Forty Thousand Four Hundred Eighty-Seven

Basics

Value: 40486 → 40487 → 40488

Parity: odd

Prime: Yes

Previous Prime: 40483

Next Prime: 40493

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 40487

Divisors: 1, 40487

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111000100111

Octal: 117047

Duodecimal: 1B51B

Hexadecimal: 9e27

Square: 1639197169

Square Root: 201.21381662301422

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

Primes p such that p² divides 5^p-1 - 1. A123692

Numbers n such that 5^A000010(n) == 1 (mod n²). A242959

"Non-generous primes": primes p whose least positive primitive root is not a primitive root of p². A55578

Numbers k such that 5^k mod k = 5^k mod k². A125775

The first prime of 8 consecutive primes a, b, c, d, e, f, g, h such that a + g = c + e and b + h = d + f. A292618

Main diagonal of Ludic array A255127 (and A255129): a(n) = A255127(n,n). A255410

Smallest prime p such that there exist exactly n integers b such that 1 < b < p and b^p-1 == 1 (mod p²) or, equivalently, Fermat quotient q_p(b) == 0 (mod p). A175932

Odd numbers k such that the ring of integers of Q(5^1/k) is not Z[5^1/k]. A342391

Primes p that have at least four primitive roots that are not primitive roots mod p². A60520

Primes of the form (1+2n+3n²+4n³)/2. A123077