42604581 has 8 divisors (see below), whose sum is σ = 56855520. Its totient is φ = 28378352.

The previous prime is 42604577. The next prime is 42604591. The reversal of 42604581 is 18540624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42604581 - 2² = 42604577 is a prime.

It is a super-2 number, since 2×42604581² = 3630300644371122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42604531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686 + ... + 9383.

It is an arithmetic number, because the mean of its divisors is an integer number (7106940).

Almost surely, 2^42604581 is an apocalyptic number.

It is an amenable number.

42604581 is a deficient number, since it is larger than the sum of its proper divisors (14250939).

42604581 is a wasteful number, since it uses less digits than its factorization.

42604581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12355.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 42604581 is about 6527.2184734387. The cubic root of 42604581 is about 349.2626135380.

The spelling of 42604581 in words is "forty-two million, six hundred four thousand, five hundred eighty-one".