42558985 has 16 divisors (see below), whose sum is σ = 58473216. Its totient is φ = 29130048.

The previous prime is 42558983. The next prime is 42559021. The reversal of 42558985 is 58985524.

It is a cyclic number.

It is not a de Polignac number, because 42558985 - 2¹ = 42558983 is a prime.

It is a super-2 number, since 2×42558985² = 3622534408460450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42558983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33787 + ... + 35023.

It is an arithmetic number, because the mean of its divisors is an integer number (3654576).

Almost surely, 2^42558985 is an apocalyptic number.

It is an amenable number.

42558985 is a deficient number, since it is larger than the sum of its proper divisors (15914231).

42558985 is a wasteful number, since it uses less digits than its factorization.

42558985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its digits is 576000, while the sum is 46.

The square root of 42558985 is about 6523.7247796025. The cubic root of 42558985 is about 349.1379738696.

It can be divided in two parts, 4255898 and 5, that added together give a triangular number (4255903 = T₂₉₁₇).

The spelling of 42558985 in words is "forty-two million, five hundred fifty-eight thousand, nine hundred eighty-five".