42581686 has 24 divisors (see below), whose sum is σ = 76867920. Its totient is φ = 17618832.

The previous prime is 42581639. The next prime is 42581687. The reversal of 42581686 is 68618524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42581687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4650 + ... + 10333.

It is an arithmetic number, because the mean of its divisors is an integer number (3202830).

Almost surely, 2^42581686 is an apocalyptic number.

42581686 is a deficient number, since it is larger than the sum of its proper divisors (34286234).

42581686 is a wasteful number, since it uses less digits than its factorization.

42581686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15028 (or 15021 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 42581686 is about 6525.4644279162. The cubic root of 42581686 is about 349.2000396696.

The spelling of 42581686 in words is "forty-two million, five hundred eighty-one thousand, six hundred eighty-six".