138532 has 12 divisors (see below), whose sum is σ = 246960. Its totient is φ = 67976.

The previous prime is 138517. The next prime is 138547. The reversal of 138532 is 235831.

It is an interprime number because it is at equal distance from previous prime (138517) and next prime (138547).

It is a super-2 number, since 2×138532² = 38382230048, which contains 22 as substring.

It is an unprimeable number.

138532 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (20580).

2¹³⁸⁵³² is an apocalyptic number.

It is an amenable number.

138532 is a deficient number, since it is larger than the sum of its proper divisors (108428).

138532 is a wasteful number, since it uses less digits than its factorization.

138532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 648 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 138532 is about 372.1988715727. The cubic root of 138532 is about 51.7428129143.

The spelling of 138532 in words is "one hundred thirty-eight thousand, five hundred thirty-two".