42591586 has 16 divisors (see below), whose sum is σ = 66211200. Its totient is φ = 20533968.

The previous prime is 42591583. The next prime is 42591589. The reversal of 42591586 is 68519524.

It is an interprime number because it is at equal distance from previous prime (42591583) and next prime (42591589).

It is not an unprimeable number, because it can be changed into a prime (42591583) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3660 + ... + 9928.

It is an arithmetic number, because the mean of its divisors is an integer number (4138200).

Almost surely, 2^42591586 is an apocalyptic number.

42591586 is a deficient number, since it is larger than the sum of its proper divisors (23619614).

42591586 is a wasteful number, since it uses less digits than its factorization.

42591586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393.

The product of its digits is 86400, while the sum is 40.

The square root of 42591586 is about 6526.2229505281. Note that the first 3 decimals coincide. The cubic root of 42591586 is about 349.2270999141.

The spelling of 42591586 in words is "forty-two million, five hundred ninety-one thousand, five hundred eighty-six".