12647749 has 8 divisors (see below), whose sum is σ = 13412000. Its totient is φ = 11893392.

The previous prime is 12647729. The next prime is 12647753. The reversal of 12647749 is 94774621.

12647749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12647749 - 2⁵ = 12647717 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 (12647729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 5035.

It is an arithmetic number, because the mean of its divisors is an integer number (1676500).

Almost surely, 2^12647749 is an apocalyptic number.

12647749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12647749 is a deficient number, since it is larger than the sum of its proper divisors (764251).

12647749 is a wasteful number, since it uses less digits than its factorization.

12647749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947.

The product of its digits is 84672, while the sum is 40.

The square root of 12647749 is about 3556.3673882207. The cubic root of 12647749 is about 232.9902493049.

The spelling of 12647749 in words is "twelve million, six hundred forty-seven thousand, seven hundred forty-nine".