12581725 has 12 divisors (see below), whose sum is σ = 16801876. Its totient is φ = 9290880.

The previous prime is 12581707. The next prime is 12581747. The reversal of 12581725 is 52718521.

It can be written as a sum of positive squares in 6 ways, for example, as 338724 + 12243001 = 582^2 + 3499^2 .

It is not a de Polignac number, because 12581725 - 2⁵ = 12581693 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19032 + ... + 19681.

Almost surely, 2^12581725 is an apocalyptic number.

It is an amenable number.

12581725 is a deficient number, since it is larger than the sum of its proper divisors (4220151).

12581725 is a wasteful number, since it uses less digits than its factorization.

12581725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38736 (or 38731 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 12581725 is about 3547.0727367789. The cubic root of 12581725 is about 232.5841218703.

The spelling of 12581725 in words is "twelve million, five hundred eighty-one thousand, seven hundred twenty-five".