12656749 has 12 divisors (see below), whose sum is σ = 15068064. Its totient is φ = 10594584.

The previous prime is 12656737. The next prime is 12656783. The reversal of 12656749 is 94765621.

It is not a de Polignac number, because 12656749 - 2¹⁵ = 12623981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 897 + ... + 5110.

It is an arithmetic number, because the mean of its divisors is an integer number (1255672).

Almost surely, 2^12656749 is an apocalyptic number.

It is an amenable number.

12656749 is a deficient number, since it is larger than the sum of its proper divisors (2411315).

12656749 is an equidigital number, since it uses as much as digits as its factorization.

12656749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064 (or 6057 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 12656749 is about 3557.6324992894. The cubic root of 12656749 is about 233.0455006402.

The spelling of 12656749 in words is "twelve million, six hundred fifty-six thousand, seven hundred forty-nine".