139392442 has 16 divisors (see below), whose sum is σ = 242877312. Its totient is φ = 58759920.

The previous prime is 139392439. The next prime is 139392457. The reversal of 139392442 is 244293931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80758 + ... + 82465.

It is an arithmetic number, because the mean of its divisors is an integer number (15179832).

Almost surely, 2^139392442 is an apocalyptic number.

139392442 is a deficient number, since it is larger than the sum of its proper divisors (103484870).

139392442 is a wasteful number, since it uses less digits than its factorization.

139392442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163293.

The product of its digits is 46656, while the sum is 37.

The square root of 139392442 is about 11806.4576397834. The cubic root of 139392442 is about 518.4971921114.

The spelling of 139392442 in words is "one hundred thirty-nine million, three hundred ninety-two thousand, four hundred forty-two".