138762625 has 16 divisors (see below), whose sum is σ = 173573712. Its totient is φ = 110755200.

The previous prime is 138762623. The next prime is 138762641. The reversal of 138762625 is 526267831.

It can be written as a sum of positive squares in 8 ways, for example, as 61340224 + 77422401 = 7832^2 + 8799^2 .

It is not a de Polignac number, because 138762625 - 2¹ = 138762623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138762623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68629 + ... + 70621.

It is an arithmetic number, because the mean of its divisors is an integer number (10848357).

Almost surely, 2^138762625 is an apocalyptic number.

It is an amenable number.

138762625 is a deficient number, since it is larger than the sum of its proper divisors (34811087).

138762625 is an equidigital number, since it uses as much as digits as its factorization.

138762625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2555 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 138762625 is about 11779.7548786042. The cubic root of 138762625 is about 517.7151042419.

The spelling of 138762625 in words is "one hundred thirty-eight million, seven hundred sixty-two thousand, six hundred twenty-five".