12749278 has 16 divisors (see below), whose sum is σ = 19721520. Its totient is φ = 6177600.

The previous prime is 12749273. The next prime is 12749293. The reversal of 12749278 is 87294721.

12749278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12749278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14413 + ... + 15271.

It is an arithmetic number, because the mean of its divisors is an integer number (1232595).

Almost surely, 2^12749278 is an apocalyptic number.

12749278 is a deficient number, since it is larger than the sum of its proper divisors (6972242).

12749278 is a wasteful number, since it uses less digits than its factorization.

12749278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083.

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

The square root of 12749278 is about 3570.6131126181. The cubic root of 12749278 is about 233.6120266334.

The spelling of 12749278 in words is "twelve million, seven hundred forty-nine thousand, two hundred seventy-eight".