12400955 has 8 divisors (see below), whose sum is σ = 17007072. Its totient is φ = 8503488.

The previous prime is 12400943. The next prime is 12400967. The reversal of 12400955 is 55900421.

12400955 = 1328² + 1329² + ... + 1334².

It is an interprime number because it is at equal distance from previous prime (12400943) and next prime (12400967).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12400955 - 2⁸ = 12400699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177122 + ... + 177191.

It is an arithmetic number, because the mean of its divisors is an integer number (2125884).

Almost surely, 2^12400955 is an apocalyptic number.

12400955 is a deficient number, since it is larger than the sum of its proper divisors (4606117).

12400955 is an equidigital number, since it uses as much as digits as its factorization.

12400955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354325.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12400955 is about 3521.4989706090. The cubic root of 12400955 is about 231.4648473230.

The spelling of 12400955 in words is "twelve million, four hundred thousand, nine hundred fifty-five".