12920168 has 8 divisors (see below), whose sum is σ = 24225330. Its totient is φ = 6460080.

The previous prime is 12920093. The next prime is 12920177. The reversal of 12920168 is 86102921.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 232324 = 3562^2 + 482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12920168² = 333861482296448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12920168.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807503 + ... + 807518.

Almost surely, 2^12920168 is an apocalyptic number.

It is an amenable number.

12920168 is a deficient number, since it is larger than the sum of its proper divisors (11305162).

12920168 is a wasteful number, since it uses less digits than its factorization.

12920168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615027 (or 1615023 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12920168 is about 3594.4635204714. The cubic root of 12920168 is about 234.6511679818.

The spelling of 12920168 in words is "twelve million, nine hundred twenty thousand, one hundred sixty-eight".