12871978 has 8 divisors (see below), whose sum is σ = 22066272. Its totient is φ = 5516556.

The previous prime is 12871933. The next prime is 12872003. The reversal of 12871978 is 87917821.

It is a happy number.

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

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, 459700 + ... + 459727.

It is an arithmetic number, because the mean of its divisors is an integer number (2758284).

Almost surely, 2^12871978 is an apocalyptic number.

12871978 is a deficient number, since it is larger than the sum of its proper divisors (9194294).

12871978 is an equidigital number, since it uses as much as digits as its factorization.

12871978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919436.

The product of its digits is 56448, while the sum is 43.

The square root of 12871978 is about 3587.7538934548. The cubic root of 12871978 is about 234.3590683808.

The spelling of 12871978 in words is "twelve million, eight hundred seventy-one thousand, nine hundred seventy-eight".