12508091 has 2 divisors, whose sum is σ = 12508092. Its totient is φ = 12508090.

The previous prime is 12508087. The next prime is 12508117. The reversal of 12508091 is 19080521.

It is a happy number.

It is an a-pointer prime, because the next prime (12508117) can be obtained adding 12508091 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12508091 - 2² = 12508087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12508091.

It is not a weakly prime, because it can be changed into another prime (12508031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254045 + 6254046.

It is an arithmetic number, because the mean of its divisors is an integer number (6254046).

Almost surely, 2^12508091 is an apocalyptic number.

12508091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12508091 is an equidigital number, since it uses as much as digits as its factorization.

12508091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12508091 is about 3536.6779610250. The cubic root of 12508091 is about 232.1295043410.

The spelling of 12508091 in words is "twelve million, five hundred eight thousand, ninety-one".