12942978 has 8 divisors (see below), whose sum is σ = 25885968. Its totient is φ = 4314324.

The previous prime is 12942977. The next prime is 12942983. The reversal of 12942978 is 87924921.

12942978 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 a sphenic number, since it is the product of 3 distinct primes.

12942978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12942977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078576 + ... + 1078587.

It is an arithmetic number, because the mean of its divisors is an integer number (3235746).

Almost surely, 2^12942978 is an apocalyptic number.

12942978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12942978 is a wasteful number, since it uses less digits than its factorization.

12942978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157168.

The product of its digits is 72576, while the sum is 42.

The square root of 12942978 is about 3597.6350565337. The cubic root of 12942978 is about 234.7891756409.

The spelling of 12942978 in words is "twelve million, nine hundred forty-two thousand, nine hundred seventy-eight".