12321904 has 20 divisors (see below), whose sum is σ = 27284464. Its totient is φ = 5280768.

The previous prime is 12321901. The next prime is 12321919. The reversal of 12321904 is 40912321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54897 + ... + 55120.

Almost surely, 2^12321904 is an apocalyptic number.

12321904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12321904 is an abundant number, since it is smaller than the sum of its proper divisors (14962560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321904 is a wasteful number, since it uses less digits than its factorization.

12321904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110032 (or 110026 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12321904 is about 3510.2569706504. The cubic root of 12321904 is about 230.9719673884.

It can be divided in two parts, 12321 and 904, that added together give a square (13225 = 115²).

The spelling of 12321904 in words is "twelve million, three hundred twenty-one thousand, nine hundred four".