139306742 has 4 divisors (see below), whose sum is σ = 208960116. Its totient is φ = 69653370.

The previous prime is 139306733. The next prime is 139306751. The reversal of 139306742 is 247603931.

139306742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (139306733) and next prime (139306751).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34826684 + ... + 34826687.

It is an arithmetic number, because the mean of its divisors is an integer number (52240029).

Almost surely, 2^139306742 is an apocalyptic number.

139306742 is a deficient number, since it is larger than the sum of its proper divisors (69653374).

139306742 is an equidigital number, since it uses as much as digits as its factorization.

139306742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69653373.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 139306742 is about 11802.8277120358. The cubic root of 139306742 is about 518.3909110767.

The spelling of 139306742 in words is "one hundred thirty-nine million, three hundred six thousand, seven hundred forty-two".