12749144 has 8 divisors (see below), whose sum is σ = 23904660. Its totient is φ = 6374568.

The previous prime is 12749131. The next prime is 12749147. The reversal of 12749144 is 44194721.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×12749144³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12749144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 796814 + ... + 796829.

Almost surely, 2^12749144 is an apocalyptic number.

It is an amenable number.

12749144 is a deficient number, since it is larger than the sum of its proper divisors (11155516).

12749144 is a wasteful number, since it uses less digits than its factorization.

12749144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593649 (or 1593645 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 12749144 is about 3570.5943482843. The cubic root of 12749144 is about 233.6112081787.

The spelling of 12749144 in words is "twelve million, seven hundred forty-nine thousand, one hundred forty-four".