42581238 has 16 divisors (see below), whose sum is σ = 97328640. Its totient is φ = 12166056.

The previous prime is 42581221. The next prime is 42581267. The reversal of 42581238 is 83218524.

It is a super-2 number, since 2×42581238² = 3626323659225288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42581199 and 42581208.

It is a congruent 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, 506878 + ... + 506961.

It is an arithmetic number, because the mean of its divisors is an integer number (6083040).

Almost surely, 2^42581238 is an apocalyptic number.

42581238 is an abundant number, since it is smaller than the sum of its proper divisors (54747402).

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

42581238 is a wasteful number, since it uses less digits than its factorization.

42581238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013851.

The product of its digits is 15360, while the sum is 33.

The square root of 42581238 is about 6525.4301007673. The cubic root of 42581238 is about 349.1988150260.

The spelling of 42581238 in words is "forty-two million, five hundred eighty-one thousand, two hundred thirty-eight".