42261918 has 16 divisors (see below), whose sum is σ = 86808720. Its totient is φ = 13706496.

The previous prime is 42261899. The next prime is 42261929. The reversal of 42261918 is 81916224.

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, 94963 + ... + 95406.

It is an arithmetic number, because the mean of its divisors is an integer number (5425545).

Almost surely, 2^42261918 is an apocalyptic number.

42261918 is an abundant number, since it is smaller than the sum of its proper divisors (44546802).

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

42261918 is a wasteful number, since it uses less digits than its factorization.

42261918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190411.

The product of its digits is 6912, while the sum is 33.

The square root of 42261918 is about 6500.9167045887. The cubic root of 42261918 is about 348.3237342857.

The spelling of 42261918 in words is "forty-two million, two hundred sixty-one thousand, nine hundred eighteen".