12749668 has 12 divisors (see below), whose sum is σ = 22378300. Its totient is φ = 6355872.

The previous prime is 12749663. The next prime is 12749689. The reversal of 12749668 is 86694721.

It can be written as a sum of positive squares in 2 ways, for example, as 9784384 + 2965284 = 3128^2 + 1722^2 .

It is a super-2 number, since 2×12749668² = 325108068220448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12749663) 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, 3171 + ... + 5962.

Almost surely, 2^12749668 is an apocalyptic number.

It is an amenable number.

12749668 is a deficient number, since it is larger than the sum of its proper divisors (9628632).

12749668 is a wasteful number, since it uses less digits than its factorization.

12749668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486 (or 9484 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 12749668 is about 3570.6677246700. The cubic root of 12749668 is about 233.6144086706.

The spelling of 12749668 in words is "twelve million, seven hundred forty-nine thousand, six hundred sixty-eight".