12739749 has 16 divisors (see below), whose sum is σ = 19621440. Its totient is φ = 7266560.

The previous prime is 12739721. The next prime is 12739763. The reversal of 12739749 is 94793721.

It is a cyclic number.

It is not a de Polignac number, because 12739749 - 2⁵ = 12739717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12739749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10794 + ... + 11915.

It is an arithmetic number, because the mean of its divisors is an integer number (1226340).

Almost surely, 2^12739749 is an apocalyptic number.

It is an amenable number.

12739749 is a deficient number, since it is larger than the sum of its proper divisors (6881691).

12739749 is a wasteful number, since it uses less digits than its factorization.

12739749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22740.

The product of its digits is 95256, while the sum is 42.

The square root of 12739749 is about 3569.2784985204. The cubic root of 12739749 is about 233.5538104260.

The spelling of 12739749 in words is "twelve million, seven hundred thirty-nine thousand, seven hundred forty-nine".