12825991 has 2 divisors, whose sum is σ = 12825992. Its totient is φ = 12825990.

The previous prime is 12825979. The next prime is 12826001. The reversal of 12825991 is 19952821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12825991 - 2⁵ = 12825959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12825991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12825961) 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, 6412995 + 6412996.

It is an arithmetic number, because the mean of its divisors is an integer number (6412996).

Almost surely, 2^12825991 is an apocalyptic number.

12825991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12825991 is an equidigital number, since it uses as much as digits as its factorization.

12825991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 37.

The square root of 12825991 is about 3581.3392746290. The cubic root of 12825991 is about 234.0796414814.

The spelling of 12825991 in words is "twelve million, eight hundred twenty-five thousand, nine hundred ninety-one".