12742978 has 8 divisors (see below), whose sum is σ = 19163340. Its totient is φ = 6355200.

The previous prime is 12742957. The next prime is 12742993. The reversal of 12742978 is 87924721.

It can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 471969 = 3503^2 + 687^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12742978.

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, 7143 + ... + 8746.

Almost surely, 2^12742978 is an apocalyptic number.

12742978 is a deficient number, since it is larger than the sum of its proper divisors (6420362).

12742978 is a wasteful number, since it uses less digits than its factorization.

12742978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16292.

The product of its digits is 56448, while the sum is 40.

The square root of 12742978 is about 3569.7308021754. The cubic root of 12742978 is about 233.5735408396.

The spelling of 12742978 in words is "twelve million, seven hundred forty-two thousand, nine hundred seventy-eight".