12875021 has 2 divisors, whose sum is σ = 12875022. Its totient is φ = 12875020.

The previous prime is 12875003. The next prime is 12875059. The reversal of 12875021 is 12057821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 15625 = 3586^2 + 125^2 .

It is an emirp because it is prime and its reverse (12057821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12875021 - 2²² = 8680717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12875081) 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, 6437510 + 6437511.

It is an arithmetic number, because the mean of its divisors is an integer number (6437511).

Almost surely, 2^12875021 is an apocalyptic number.

It is an amenable number.

12875021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12875021 is an equidigital number, since it uses as much as digits as its factorization.

12875021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12875021 is about 3588.1779498793. The cubic root of 12875021 is about 234.3775348111.

The spelling of 12875021 in words is "twelve million, eight hundred seventy-five thousand, twenty-one".