12749239 has 2 divisors, whose sum is σ = 12749240. Its totient is φ = 12749238.

The previous prime is 12749197. The next prime is 12749263. The reversal of 12749239 is 93294721.

12749239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12749239 - 2⁷ = 12749111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12749198 and 12749207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12749039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374619 + 6374620.

It is an arithmetic number, because the mean of its divisors is an integer number (6374620).

Almost surely, 2^12749239 is an apocalyptic number.

12749239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749239 is an equidigital number, since it uses as much as digits as its factorization.

12749239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 12749239 is about 3570.6076513669. The cubic root of 12749239 is about 233.6117884270.

The spelling of 12749239 in words is "twelve million, seven hundred forty-nine thousand, two hundred thirty-nine".