12439725 has 24 divisors (see below), whose sum is σ = 21010560. Its totient is φ = 6491520.

The previous prime is 12439723. The next prime is 12439727. The reversal of 12439725 is 52793421.

It is an interprime number because it is at equal distance from previous prime (12439723) and next prime (12439727).

It is not a de Polignac number, because 12439725 - 2¹ = 12439723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1761 + ... + 5289.

It is an arithmetic number, because the mean of its divisors is an integer number (875440).

Almost surely, 2^12439725 is an apocalyptic number.

12439725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12439725 is a deficient number, since it is larger than the sum of its proper divisors (8570835).

12439725 is a wasteful number, since it uses less digits than its factorization.

12439725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589 (or 3584 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 12439725 is about 3526.9994329458. Note that the first 3 decimals coincide. The cubic root of 12439725 is about 231.7058114647.

The spelling of 12439725 in words is "twelve million, four hundred thirty-nine thousand, seven hundred twenty-five".