42558085 has 4 divisors (see below), whose sum is σ = 51069708. Its totient is φ = 34046464.

The previous prime is 42558083. The next prime is 42558097. The reversal of 42558085 is 58085524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20223009 + 22335076 = 4497^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 42558085 - 2¹ = 42558083 is a prime.

It is a super-2 number, since 2×42558085² = 3622381197734450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42558083) 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, 4255804 + ... + 4255813.

It is an arithmetic number, because the mean of its divisors is an integer number (12767427).

Almost surely, 2^42558085 is an apocalyptic number.

It is an amenable number.

42558085 is a deficient number, since it is larger than the sum of its proper divisors (8511623).

42558085 is an equidigital number, since it uses as much as digits as its factorization.

42558085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511622.

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 42558085 is about 6523.6558002396. The cubic root of 42558085 is about 349.1355127646.

The spelling of 42558085 in words is "forty-two million, five hundred fifty-eight thousand, eighty-five".