138042495 has 32 divisors (see below), whose sum is σ = 247608000. Its totient is φ = 72963072.

The previous prime is 138042479. The next prime is 138042503. The reversal of 138042495 is 594240831.

It is not a de Polignac number, because 138042495 - 2⁴ = 138042479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10731 + ... + 19779.

It is an arithmetic number, because the mean of its divisors is an integer number (7737750).

Almost surely, 2^138042495 is an apocalyptic number.

138042495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138042495 is a deficient number, since it is larger than the sum of its proper divisors (109565505).

138042495 is a wasteful number, since it uses less digits than its factorization.

138042495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176 (or 9170 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 138042495 is about 11749.1486925649. The cubic root of 138042495 is about 516.8179630910.

The spelling of 138042495 in words is "one hundred thirty-eight million, forty-two thousand, four hundred ninety-five".