12157307 has 2 divisors, whose sum is σ = 12157308. Its totient is φ = 12157306.

The previous prime is 12157303. The next prime is 12157309. The reversal of 12157307 is 70375121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12157307 - 2² = 12157303 is a prime.

It is a super-2 number, since 2×12157307² = 295600226984498, which contains 22 as substring.

Together with 12157309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12157303) 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, 6078653 + 6078654.

It is an arithmetic number, because the mean of its divisors is an integer number (6078654).

Almost surely, 2^12157307 is an apocalyptic number.

12157307 is a deficient number, since it is larger than the sum of its proper divisors (1).

12157307 is an equidigital number, since it uses as much as digits as its factorization.

12157307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 12157307 is about 3486.7329980943. The cubic root of 12157307 is about 229.9389062687.

The spelling of 12157307 in words is "twelve million, one hundred fifty-seven thousand, three hundred seven".