138455025 has 12 divisors (see below), whose sum is σ = 228912432. Its totient is φ = 73842640.

The previous prime is 138455017. The next prime is 138455029. The reversal of 138455025 is 520554831.

It is not a de Polignac number, because 138455025 - 2³ = 138455017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138455029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 922959 + ... + 923108.

It is an arithmetic number, because the mean of its divisors is an integer number (19076036).

Almost surely, 2^138455025 is an apocalyptic number.

138455025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138455025 is a deficient number, since it is larger than the sum of its proper divisors (90457407).

138455025 is a wasteful number, since it uses less digits than its factorization.

138455025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846080 (or 1846075 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 138455025 is about 11766.6913361403. The cubic root of 138455025 is about 517.3322754548.

The spelling of 138455025 in words is "one hundred thirty-eight million, four hundred fifty-five thousand, twenty-five".