12739225 has 6 divisors (see below), whose sum is σ = 15796670. Its totient is φ = 10191360.

The previous prime is 12739189. The next prime is 12739229. The reversal of 12739225 is 52293721.

It can be written as a sum of positive squares in 3 ways, for example, as 2778889 + 9960336 = 1667^2 + 3156^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12739225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12739229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254760 + ... + 254809.

Almost surely, 2^12739225 is an apocalyptic number.

It is an amenable number.

12739225 is a deficient number, since it is larger than the sum of its proper divisors (3057445).

12739225 is an equidigital number, since it uses as much as digits as its factorization.

12739225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509579 (or 509574 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 12739225 is about 3569.2050935748. The cubic root of 12739225 is about 233.5506082731.

The spelling of 12739225 in words is "twelve million, seven hundred thirty-nine thousand, two hundred twenty-five".