139305942 has 24 divisors (see below), whose sum is σ = 307526544. Its totient is φ = 45558864.

The previous prime is 139305941. The next prime is 139305949. The reversal of 139305942 is 249503931.

It is a happy number.

139305942 is a `hidden beast` number, since 1 + 39 + 30 + 594 + 2 = 666.

139305942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×139305942² = 38812290953014728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139305897 and 139305906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139305941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72058 + ... + 73965.

It is an arithmetic number, because the mean of its divisors is an integer number (12813606).

Almost surely, 2^139305942 is an apocalyptic number.

139305942 is an abundant number, since it is smaller than the sum of its proper divisors (168220602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139305942 is a wasteful number, since it uses less digits than its factorization.

139305942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146084 (or 146081 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 139305942 is about 11802.7938218034. The cubic root of 139305942 is about 518.3899187497.

The spelling of 139305942 in words is "one hundred thirty-nine million, three hundred five thousand, nine hundred forty-two".