138750252 has 24 divisors (see below), whose sum is σ = 325399536. Its totient is φ = 46014528.

The previous prime is 138750247. The next prime is 138750257. The reversal of 138750252 is 252057831.

It is an interprime number because it is at equal distance from previous prime (138750247) and next prime (138750257).

It is not an unprimeable number, because it can be changed into a prime (138750257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26983 + ... + 31710.

It is an arithmetic number, because the mean of its divisors is an integer number (13558314).

Almost surely, 2^138750252 is an apocalyptic number.

138750252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138750252 is an abundant number, since it is smaller than the sum of its proper divisors (186649284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138750252 is a wasteful number, since it uses less digits than its factorization.

138750252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58897 (or 58895 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 138750252 is about 11779.2296861892. The cubic root of 138750252 is about 517.6997161420.

The spelling of 138750252 in words is "one hundred thirty-eight million, seven hundred fifty thousand, two hundred fifty-two".