42139554 has 16 divisors (see below), whose sum is σ = 86335200. Its totient is φ = 13703840.

The previous prime is 42139543. The next prime is 42139561. The reversal of 42139554 is 45593124.

It is a super-2 number, since 2×42139554² = 3551484022637832, which contains 22 as substring.

It is a Curzon 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, 85404 + ... + 85895.

It is an arithmetic number, because the mean of its divisors is an integer number (5395950).

Almost surely, 2^42139554 is an apocalyptic number.

42139554 is an abundant number, since it is smaller than the sum of its proper divisors (44195646).

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

42139554 is a wasteful number, since it uses less digits than its factorization.

42139554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171345.

The product of its digits is 21600, while the sum is 33.

The square root of 42139554 is about 6491.4985943155. The cubic root of 42139554 is about 347.9872336445.

The spelling of 42139554 in words is "forty-two million, one hundred thirty-nine thousand, five hundred fifty-four".