12749392 has 20 divisors (see below), whose sum is σ = 24762676. Its totient is φ = 6359040.

The previous prime is 12749353. The next prime is 12749393. The reversal of 12749392 is 29394721.

It can be written as a sum of positive squares in 2 ways, for example, as 10265616 + 2483776 = 3204^2 + 1576^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749393) 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, 8542 + ... + 9922.

Almost surely, 2^12749392 is an apocalyptic number.

It is an amenable number.

12749392 is a deficient number, since it is larger than the sum of its proper divisors (12013284).

12749392 is a wasteful number, since it uses less digits than its factorization.

12749392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1960 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 12749392 is about 3570.6290762273. The cubic root of 12749392 is about 233.6127229262.

The spelling of 12749392 in words is "twelve million, seven hundred forty-nine thousand, three hundred ninety-two".