138742652 has 12 divisors (see below), whose sum is σ = 243678120. Its totient is φ = 69120336.

The previous prime is 138742651. The next prime is 138742673. The reversal of 138742652 is 256247831.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138742651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61502 + ... + 63717.

It is an arithmetic number, because the mean of its divisors is an integer number (20306510).

Almost surely, 2^138742652 is an apocalyptic number.

It is an amenable number.

138742652 is a deficient number, since it is larger than the sum of its proper divisors (104935468).

138742652 is a wasteful number, since it uses less digits than its factorization.

138742652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125500 (or 125498 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 138742652 is about 11778.9070800308. The cubic root of 138742652 is about 517.6902636915.

The spelling of 138742652 in words is "one hundred thirty-eight million, seven hundred forty-two thousand, six hundred fifty-two".