12749776 has 20 divisors (see below), whose sum is σ = 26603332. Its totient is φ = 5884416.

The previous prime is 12749771. The next prime is 12749783. The reversal of 12749776 is 67794721.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 10112400 = 1624^2 + 3180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749771) 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, 30441 + ... + 30856.

Almost surely, 2^12749776 is an apocalyptic number.

12749776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12749776 is an abundant number, since it is smaller than the sum of its proper divisors (13853556).

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

12749776 is a wasteful number, since it uses less digits than its factorization.

12749776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61318 (or 61312 counting only the distinct ones).

The product of its digits is 148176, while the sum is 43.

The square root of 12749776 is about 3570.6828478598. The cubic root of 12749776 is about 233.6150683030.

The spelling of 12749776 in words is "twelve million, seven hundred forty-nine thousand, seven hundred seventy-six".