138245192 has 12 divisors (see below), whose sum is σ = 259272105. Its totient is φ = 69105968.

The previous prime is 138245179. The next prime is 138245231. The reversal of 138245192 is 291542831.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 137968516 + 276676 = 11746^2 + 526^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8314.

It is a super-2 number, since 2×138245192² = 38223466222233728, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31178 + ... + 35334.

Almost surely, 2^138245192 is an apocalyptic number.

It is an amenable number.

138245192 is a deficient number, since it is larger than the sum of its proper divisors (121026913).

138245192 is an frugal number, since it uses more digits than its factorization.

138245192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320 (or 4159 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 138245192 is about 11757.7715575699. The cubic root of 138245192 is about 517.0707988049.

The spelling of 138245192 in words is "one hundred thirty-eight million, two hundred forty-five thousand, one hundred ninety-two".