12620891 has 2 divisors, whose sum is σ = 12620892. Its totient is φ = 12620890.

The previous prime is 12620843. The next prime is 12620939. The reversal of 12620891 is 19802621.

It is a balanced prime because it is at equal distance from previous prime (12620843) and next prime (12620939).

It is a cyclic number.

It is not a de Polignac number, because 12620891 - 2⁶ = 12620827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12620831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310445 + 6310446.

It is an arithmetic number, because the mean of its divisors is an integer number (6310446).

Almost surely, 2^12620891 is an apocalyptic number.

12620891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12620891 is an equidigital number, since it uses as much as digits as its factorization.

12620891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12620891 is about 3552.5893373707. The cubic root of 12620891 is about 232.8252110622.

The spelling of 12620891 in words is "twelve million, six hundred twenty thousand, eight hundred ninety-one".