12812531 has 2 divisors, whose sum is σ = 12812532. Its totient is φ = 12812530.

The previous prime is 12812497. The next prime is 12812537. The reversal of 12812531 is 13521821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12812531 is a prime.

It is a super-2 number, since 2×12812531² = 328321901251922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 12812497 and 12812506.

It is not a weakly prime, because it can be changed into another prime (12812537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406265 + 6406266.

It is an arithmetic number, because the mean of its divisors is an integer number (6406266).

Almost surely, 2^12812531 is an apocalyptic number.

12812531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12812531 is an equidigital number, since it uses as much as digits as its factorization.

12812531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 12812531 is about 3579.4595960843. The cubic root of 12812531 is about 233.9977292983.

The spelling of 12812531 in words is "twelve million, eight hundred twelve thousand, five hundred thirty-one".