42139854 has 12 divisors (see below), whose sum is σ = 91303056. Its totient is φ = 14046612.

The previous prime is 42139829. The next prime is 42139879. The reversal of 42139854 is 45893124.

It is an interprime number because it is at equal distance from previous prime (42139829) and next prime (42139879).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1170534 + ... + 1170569.

It is an arithmetic number, because the mean of its divisors is an integer number (7608588).

Almost surely, 2^42139854 is an apocalyptic number.

42139854 is an abundant number, since it is smaller than the sum of its proper divisors (49163202).

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

42139854 is a wasteful number, since it uses less digits than its factorization.

42139854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341111 (or 2341108 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 42139854 is about 6491.5217014195. The cubic root of 42139854 is about 347.9880594397.

The spelling of 42139854 in words is "forty-two million, one hundred thirty-nine thousand, eight hundred fifty-four".