139257392 has 20 divisors (see below), whose sum is σ = 276087240. Its totient is φ = 68009088.

The previous prime is 139257389. The next prime is 139257407. The reversal of 139257392 is 293752931.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100517 + ... + 101892.

It is an arithmetic number, because the mean of its divisors is an integer number (13804362).

Almost surely, 2^139257392 is an apocalyptic number.

It is an amenable number.

139257392 is a deficient number, since it is larger than the sum of its proper divisors (136829848).

139257392 is a wasteful number, since it uses less digits than its factorization.

139257392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202460 (or 202454 counting only the distinct ones).

The product of its digits is 102060, while the sum is 41.

The square root of 139257392 is about 11800.7369261415. The cubic root of 139257392 is about 518.3296897924.

The spelling of 139257392 in words is "one hundred thirty-nine million, two hundred fifty-seven thousand, three hundred ninety-two".