42251238 has 24 divisors (see below), whose sum is σ = 93778776. Its totient is φ = 13740000.

The previous prime is 42251227. The next prime is 42251267. The reversal of 42251238 is 83215224.

42251238 is a `hidden beast` number, since 422 + 5 + 1 + 238 = 666.

42251238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42251238² = 3570334225065288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27888 + ... + 29363.

It is an arithmetic number, because the mean of its divisors is an integer number (3907449).

Almost surely, 2^42251238 is an apocalyptic number.

42251238 is an abundant number, since it is smaller than the sum of its proper divisors (51527538).

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

42251238 is a wasteful number, since it uses less digits than its factorization.

42251238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57300 (or 57297 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 42251238 is about 6500.0952300716. The cubic root of 42251238 is about 348.2943902090.

The spelling of 42251238 in words is "forty-two million, two hundred fifty-one thousand, two hundred thirty-eight".