12921104 has 30 divisors (see below), whose sum is σ = 29123694. Its totient is φ = 5537280.

The previous prime is 12921091. The next prime is 12921119. The reversal of 12921104 is 40112921.

It can be written as a sum of positive squares in only one way, i.e., 10549504 + 2371600 = 3248^2 + 1540^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7457 + ... + 9024.

Almost surely, 2^12921104 is an apocalyptic number.

12921104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12921104 is an abundant number, since it is smaller than the sum of its proper divisors (16202590).

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

12921104 is a wasteful number, since it uses less digits than its factorization.

12921104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16503 (or 16490 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 12921104 is about 3594.5937183498. The cubic root of 12921104 is about 234.6568342701.

The spelling of 12921104 in words is "twelve million, nine hundred twenty-one thousand, one hundred four".