135939942 has 24 divisors (see below), whose sum is σ = 301387944. Its totient is φ = 44259264.

The previous prime is 135939877. The next prime is 135939949. The reversal of 135939942 is 249939531.

135939942 is a `hidden beast` number, since 13 + 593 + 9 + 9 + 42 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135939949) 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, 87043 + ... + 88590.

It is an arithmetic number, because the mean of its divisors is an integer number (12557831).

Almost surely, 2^135939942 is an apocalyptic number.

135939942 is an abundant number, since it is smaller than the sum of its proper divisors (165448002).

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

135939942 is a wasteful number, since it uses less digits than its factorization.

135939942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175684 (or 175681 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 135939942 is about 11659.3285398431. The cubic root of 135939942 is about 514.1806079517.

The spelling of 135939942 in words is "one hundred thirty-five million, nine hundred thirty-nine thousand, nine hundred forty-two".