12749919 has 16 divisors (see below), whose sum is σ = 20923392. Its totient is φ = 6725088.

The previous prime is 12749917. The next prime is 12749921. The reversal of 12749919 is 91994721.

12749919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12749917) and next prime (12749921).

It is not a de Polignac number, because 12749919 - 2¹ = 12749917 is a prime.

It is a super-2 number, since 2×12749919² = 325120869013122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749917) 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, 23079 + ... + 23624.

It is an arithmetic number, because the mean of its divisors is an integer number (1307712).

Almost surely, 2^12749919 is an apocalyptic number.

12749919 is a deficient number, since it is larger than the sum of its proper divisors (8173473).

12749919 is a wasteful number, since it uses less digits than its factorization.

12749919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46726.

The product of its digits is 40824, while the sum is 42.

The square root of 12749919 is about 3570.7028719847. The cubic root of 12749919 is about 233.6159416996.

The spelling of 12749919 in words is "twelve million, seven hundred forty-nine thousand, nine hundred nineteen".