12520531 has 2 divisors, whose sum is σ = 12520532. Its totient is φ = 12520530.

The previous prime is 12520511. The next prime is 12520537. The reversal of 12520531 is 13502521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12520531 - 2⁵ = 12520499 is a prime.

It is a super-2 number, since 2×12520531² = 313527393043922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12520499 and 12520508.

It is not a weakly prime, because it can be changed into another prime (12520537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260265 + 6260266.

It is an arithmetic number, because the mean of its divisors is an integer number (6260266).

Almost surely, 2^12520531 is an apocalyptic number.

12520531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520531 is an equidigital number, since it uses as much as digits as its factorization.

12520531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12520531 is about 3538.4362365316. The cubic root of 12520531 is about 232.2064341256.

The spelling of 12520531 in words is "twelve million, five hundred twenty thousand, five hundred thirty-one".