39725025 has 24 divisors (see below), whose sum is σ = 68537280. Its totient is φ = 20264640.

The previous prime is 39724987. The next prime is 39725027. The reversal of 39725025 is 52052793.

It is not a de Polignac number, because 39725025 - 2⁷ = 39724897 is a prime.

It is a super-2 number, since 2×39725025² = 3156155222501250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39725027) 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, 9790 + ... + 13239.

It is an arithmetic number, because the mean of its divisors is an integer number (2855720).

Almost surely, 2^39725025 is an apocalyptic number.

It is an amenable number.

39725025 is a deficient number, since it is larger than the sum of its proper divisors (28812255).

39725025 is a wasteful number, since it uses less digits than its factorization.

39725025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23065 (or 23060 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 39725025 is about 6302.7791489152. The cubic root of 39725025 is about 341.2097189771.

The spelling of 39725025 in words is "thirty-nine million, seven hundred twenty-five thousand, twenty-five".