138492075 has 12 divisors (see below), whose sum is σ = 228973688. Its totient is φ = 73862400.

The previous prime is 138492071. The next prime is 138492077. The reversal of 138492075 is 570294831.

It is not a de Polignac number, because 138492075 - 2² = 138492071 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138492071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 923206 + ... + 923355.

Almost surely, 2^138492075 is an apocalyptic number.

138492075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138492075 is a deficient number, since it is larger than the sum of its proper divisors (90481613).

138492075 is a wasteful number, since it uses less digits than its factorization.

138492075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846574 (or 1846569 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 138492075 is about 11768.2655901369. The cubic root of 138492075 is about 517.3784166749.

The spelling of 138492075 in words is "one hundred thirty-eight million, four hundred ninety-two thousand, seventy-five".