12912971 has 2 divisors, whose sum is σ = 12912972. Its totient is φ = 12912970.

The previous prime is 12912967. The next prime is 12913003. The reversal of 12912971 is 17921921.

It is an a-pointer prime, because the next prime (12913003) can be obtained adding 12912971 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12912971 - 2² = 12912967 is a prime.

It is equal to p₈₄₃₉₇₁ and since 12912971 and 843971 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12912901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6456485 + 6456486.

It is an arithmetic number, because the mean of its divisors is an integer number (6456486).

Almost surely, 2^12912971 is an apocalyptic number.

12912971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12912971 is an equidigital number, since it uses as much as digits as its factorization.

12912971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 32.

The square root of 12912971 is about 3593.4622580459. The cubic root of 12912971 is about 234.6075901655.

The spelling of 12912971 in words is "twelve million, nine hundred twelve thousand, nine hundred seventy-one".