12310905 has 16 divisors (see below), whose sum is σ = 19805184. Its totient is φ = 6529920.

The previous prime is 12310889. The next prime is 12310913. The reversal of 12310905 is 50901321.

It is not a de Polignac number, because 12310905 - 2⁴ = 12310889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (1237824).

Almost surely, 2^12310905 is an apocalyptic number.

12310905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12310905 is the 2865-th pentagonal number.

It is an amenable number.

12310905 is a deficient number, since it is larger than the sum of its proper divisors (7494279).

12310905 is a wasteful number, since it uses less digits than its factorization.

12310905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 12310905 is about 3508.6899264540. The cubic root of 12310905 is about 230.9032221429.

The spelling of 12310905 in words is "twelve million, three hundred ten thousand, nine hundred five".