12900128 has 24 divisors (see below), whose sum is σ = 26274780. Its totient is φ = 6227200.

The previous prime is 12900103. The next prime is 12900131. The reversal of 12900128 is 82100921.

It can be written as a sum of positive squares in 2 ways, for example, as 12475024 + 425104 = 3532^2 + 652^2 .

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, 6023 + ... + 7878.

Almost surely, 2^12900128 is an apocalyptic number.

It is an amenable number.

12900128 is an abundant number, since it is smaller than the sum of its proper divisors (13374652).

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

12900128 is a wasteful number, since it uses less digits than its factorization.

12900128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13940 (or 13932 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 12900128 is about 3591.6748182429. The cubic root of 12900128 is about 234.5297855883.

The spelling of 12900128 in words is "twelve million, nine hundred thousand, one hundred twenty-eight".