42591684 has 12 divisors (see below), whose sum is σ = 99380624. Its totient is φ = 14197224.

The previous prime is 42591683. The next prime is 42591697. The reversal of 42591684 is 48619524.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (42591683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1774642 + ... + 1774665.

Almost surely, 2^42591684 is an apocalyptic number.

It is an amenable number.

42591684 is an abundant number, since it is smaller than the sum of its proper divisors (56788940).

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

42591684 is a wasteful number, since it uses less digits than its factorization.

42591684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549314 (or 3549312 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 42591684 is about 6526.2304586951. The cubic root of 42591684 is about 349.2273677623.

The spelling of 42591684 in words is "forty-two million, five hundred ninety-one thousand, six hundred eighty-four".