39725725 has 24 divisors (see below), whose sum is σ = 54774272. Its totient is φ = 28382400.

The previous prime is 39725723. The next prime is 39725731. The reversal of 39725725 is 52752793.

It is not a de Polignac number, because 39725725 - 2¹ = 39725723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39725723) 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, 8104 + ... + 12046.

Almost surely, 2^39725725 is an apocalyptic number.

It is an amenable number.

39725725 is a deficient number, since it is larger than the sum of its proper divisors (15048547).

39725725 is a wasteful number, since it uses less digits than its factorization.

39725725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 3992 counting only the distinct ones).

The product of its digits is 132300, while the sum is 40.

The square root of 39725725 is about 6302.8346797294. The cubic root of 39725725 is about 341.2117231328.

The spelling of 39725725 in words is "thirty-nine million, seven hundred twenty-five thousand, seven hundred twenty-five".