12758731 has 2 divisors, whose sum is σ = 12758732. Its totient is φ = 12758730.

The previous prime is 12758729. The next prime is 12758741. The reversal of 12758731 is 13785721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12758731 - 2¹ = 12758729 is a prime.

It is a super-2 number, since 2×12758731² = 325570433460722, which contains 22 as substring.

Together with 12758729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12758741) 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, 6379365 + 6379366.

It is an arithmetic number, because the mean of its divisors is an integer number (6379366).

Almost surely, 2^12758731 is an apocalyptic number.

12758731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12758731 is an equidigital number, since it uses as much as digits as its factorization.

12758731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 12758731 is about 3571.9365895827. The cubic root of 12758731 is about 233.6697498739.

The spelling of 12758731 in words is "twelve million, seven hundred fifty-eight thousand, seven hundred thirty-one".