42139512 has 24 divisors (see below), whose sum is σ = 114128040. Its totient is φ = 14046480.

The previous prime is 42139501. The next prime is 42139529. The reversal of 42139512 is 21593124.

It is a tau number, because it is divible by the number of its divisors (24).

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, 292564 + ... + 292707.

It is an arithmetic number, because the mean of its divisors is an integer number (4755335).

Almost surely, 2^42139512 is an apocalyptic number.

It is an amenable number.

42139512 is an abundant number, since it is smaller than the sum of its proper divisors (71988528).

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

42139512 is a wasteful number, since it uses less digits than its factorization.

42139512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585283 (or 585276 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 42139512 is about 6491.4953593144. The cubic root of 42139512 is about 347.9871180329.

The spelling of 42139512 in words is "forty-two million, one hundred thirty-nine thousand, five hundred twelve".