12748749 has 16 divisors (see below), whose sum is σ = 18480000. Its totient is φ = 7770816.

The previous prime is 12748741. The next prime is 12748751. The reversal of 12748749 is 94784721.

It is a happy number.

12748749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12748749 - 2³ = 12748741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12748749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12748741) 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, 2752 + ... + 5750.

It is an arithmetic number, because the mean of its divisors is an integer number (1155000).

Almost surely, 2^12748749 is an apocalyptic number.

It is an amenable number.

12748749 is a deficient number, since it is larger than the sum of its proper divisors (5731251).

12748749 is a wasteful number, since it uses less digits than its factorization.

12748749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124.

The product of its digits is 112896, while the sum is 42.

The square root of 12748749 is about 3570.5390349358. The cubic root of 12748749 is about 233.6087955362.

The spelling of 12748749 in words is "twelve million, seven hundred forty-eight thousand, seven hundred forty-nine".