12881978 has 16 divisors (see below), whose sum is σ = 20281536. Its totient is φ = 6124800.

The previous prime is 12881969. The next prime is 12881987. The reversal of 12881978 is 87918821.

It is an interprime number because it is at equal distance from previous prime (12881969) and next prime (12881987).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8153 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (1267596).

Almost surely, 2^12881978 is an apocalyptic number.

12881978 is a deficient number, since it is larger than the sum of its proper divisors (7399558).

12881978 is a wasteful number, since it uses less digits than its factorization.

12881978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669.

The product of its digits is 64512, while the sum is 44.

The square root of 12881978 is about 3589.1472524821. The cubic root of 12881978 is about 234.4197424033.

The spelling of 12881978 in words is "twelve million, eight hundred eighty-one thousand, nine hundred seventy-eight".