12920138 has 48 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 4841760.

The previous prime is 12920093. The next prime is 12920177. The reversal of 12920138 is 83102921.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48995 + ... + 49257.

It is an arithmetic number, because the mean of its divisors is an integer number (526680).

Almost surely, 2^12920138 is an apocalyptic number.

12920138 is a deficient number, since it is larger than the sum of its proper divisors (12360502).

12920138 is a wasteful number, since it uses less digits than its factorization.

12920138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12920138 is about 3594.4593473845. The cubic root of 12920138 is about 234.6509863655.

The spelling of 12920138 in words is "twelve million, nine hundred twenty thousand, one hundred thirty-eight".