12900978 has 32 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 4194720.

The previous prime is 12900959. The next prime is 12901001. The reversal of 12900978 is 87900921.

It is a happy number.

12900978 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700 + ... + 5127.

It is an arithmetic number, because the mean of its divisors is an integer number (917910).

Almost surely, 2^12900978 is an apocalyptic number.

12900978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12900978 is an abundant number, since it is smaller than the sum of its proper divisors (16472142).

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

12900978 is a wasteful number, since it uses less digits than its factorization.

12900978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 12900978 is about 3591.7931454915. The cubic root of 12900978 is about 234.5349365951.

The spelling of 12900978 in words is "twelve million, nine hundred thousand, nine hundred seventy-eight".