12955816 has 16 divisors (see below), whose sum is σ = 24471540. Its totient is φ = 6430080.

The previous prime is 12955783. The next prime is 12955823. The reversal of 12955816 is 61855921.

It can be written as a sum of positive squares in 2 ways, for example, as 12630916 + 324900 = 3554^2 + 570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4815 + ... + 7006.

Almost surely, 2^12955816 is an apocalyptic number.

It is an amenable number.

12955816 is a deficient number, since it is larger than the sum of its proper divisors (11515724).

12955816 is a wasteful number, since it uses less digits than its factorization.

12955816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964 (or 11960 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 12955816 is about 3599.4188419799. The cubic root of 12955816 is about 234.8667782707.

It can be divided in two parts, 129 and 55816, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 12955816 in words is "twelve million, nine hundred fifty-five thousand, eight hundred sixteen".