42558609 has 8 divisors (see below), whose sum is σ = 56784672. Its totient is φ = 28352480.

The previous prime is 42558587. The next prime is 42558617. The reversal of 42558609 is 90685524.

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 42558609 - 2⁸ = 42558353 is a prime.

It is a super-2 number, since 2×42558609² = 3622470400029762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42558619) 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, 1042 + ... + 9284.

It is an arithmetic number, because the mean of its divisors is an integer number (7098084).

Almost surely, 2^42558609 is an apocalyptic number.

It is an amenable number.

42558609 is a deficient number, since it is larger than the sum of its proper divisors (14226063).

42558609 is a wasteful number, since it uses less digits than its factorization.

42558609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9967.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 42558609 is about 6523.6959616463. The cubic root of 42558609 is about 349.1369456788.

The spelling of 42558609 in words is "forty-two million, five hundred fifty-eight thousand, six hundred nine".