42139294 has 16 divisors (see below), whose sum is σ = 67445136. Its totient is φ = 19676800.

The previous prime is 42139259. The next prime is 42139309. The reversal of 42139294 is 49293124.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 277 + ... + 9184.

It is an arithmetic number, because the mean of its divisors is an integer number (4215321).

Almost surely, 2^42139294 is an apocalyptic number.

42139294 is a deficient number, since it is larger than the sum of its proper divisors (25305842).

42139294 is a wasteful number, since it uses less digits than its factorization.

42139294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611.

The product of its digits is 15552, while the sum is 34.

The square root of 42139294 is about 6491.4785680922. The cubic root of 42139294 is about 347.9865179522.

The spelling of 42139294 in words is "forty-two million, one hundred thirty-nine thousand, two hundred ninety-four".