39138525 has 48 divisors (see below), whose sum is σ = 75054720. Its totient is φ = 19958400.

The previous prime is 39138497. The next prime is 39138527. The reversal of 39138525 is 52583193.

It is not a de Polignac number, because 39138525 - 2⁵ = 39138493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39138525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39138527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14265 + ... + 16785.

It is an arithmetic number, because the mean of its divisors is an integer number (1563640).

Almost surely, 2^39138525 is an apocalyptic number.

It is an amenable number.

39138525 is a deficient number, since it is larger than the sum of its proper divisors (35916195).

39138525 is a wasteful number, since it uses less digits than its factorization.

39138525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563 (or 2552 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 39138525 is about 6256.0790436183. The cubic root of 39138525 is about 339.5221805983.

The spelling of 39138525 in words is "thirty-nine million, one hundred thirty-eight thousand, five hundred twenty-five".