138610725 has 24 divisors (see below), whose sum is σ = 250004832. Its totient is φ = 67204800.

The previous prime is 138610711. The next prime is 138610751. The reversal of 138610725 is 527016831.

It is not a de Polignac number, because 138610725 - 2¹³ = 138602533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83182 + ... + 84831.

It is an arithmetic number, because the mean of its divisors is an integer number (10416868).

Almost surely, 2^138610725 is an apocalyptic number.

138610725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138610725 is a deficient number, since it is larger than the sum of its proper divisors (111394107).

138610725 is a wasteful number, since it uses less digits than its factorization.

138610725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168037 (or 168032 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 138610725 is about 11773.3056105751. The cubic root of 138610725 is about 517.5261253118.

The spelling of 138610725 in words is "one hundred thirty-eight million, six hundred ten thousand, seven hundred twenty-five".