42251138 has 16 divisors (see below), whose sum is σ = 67124160. Its totient is φ = 19904016.

The previous prime is 42251119. The next prime is 42251149. The reversal of 42251138 is 83115224.

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, 3773 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (4195260).

Almost surely, 2^42251138 is an apocalyptic number.

42251138 is a deficient number, since it is larger than the sum of its proper divisors (24873022).

42251138 is a wasteful number, since it uses less digits than its factorization.

42251138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13801.

The product of its digits is 1920, while the sum is 26.

The square root of 42251138 is about 6500.0875378721. The cubic root of 42251138 is about 348.2941154283.

The spelling of 42251138 in words is "forty-two million, two hundred fifty-one thousand, one hundred thirty-eight".