42139293 has 16 divisors (see below), whose sum is σ = 65425536. Its totient is φ = 23624640.

The previous prime is 42139259. The next prime is 42139309. The reversal of 42139293 is 39293124.

It is not a de Polignac number, because 42139293 - 2⁸ = 42139037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42139193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17818 + ... + 20043.

It is an arithmetic number, because the mean of its divisors is an integer number (4089096).

Almost surely, 2^42139293 is an apocalyptic number.

It is an amenable number.

42139293 is a deficient number, since it is larger than the sum of its proper divisors (23286243).

42139293 is a wasteful number, since it uses less digits than its factorization.

42139293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37924.

The product of its digits is 11664, while the sum is 33.

The square root of 42139293 is about 6491.4784910681. The cubic root of 42139293 is about 347.9865151995.

The spelling of 42139293 in words is "forty-two million, one hundred thirty-nine thousand, two hundred ninety-three".