138750025 has 12 divisors (see below), whose sum is σ = 175297932. Its totient is φ = 108904640.

The previous prime is 138750011. The next prime is 138750041. The reversal of 138750025 is 520057831.

It can be written as a sum of positive squares in 6 ways, for example, as 10426441 + 128323584 = 3229^2 + 11328^2 .

It is not a de Polignac number, because 138750025 - 2⁵ = 138749993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51034 + ... + 53683.

It is an arithmetic number, because the mean of its divisors is an integer number (14608161).

Almost surely, 2^138750025 is an apocalyptic number.

It is an amenable number.

138750025 is a deficient number, since it is larger than the sum of its proper divisors (36547907).

138750025 is a wasteful number, since it uses less digits than its factorization.

138750025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104780 (or 104775 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 138750025 is about 11779.2200505806. The cubic root of 138750025 is about 517.6994338173.

The spelling of 138750025 in words is "one hundred thirty-eight million, seven hundred fifty thousand, twenty-five".