42559989 has 8 divisors (see below), whose sum is σ = 56778432. Its totient is φ = 28357440.

The previous prime is 42559973. The next prime is 42559991. The reversal of 42559989 is 98995524.

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

It is not a de Polignac number, because 42559989 - 2⁴ = 42559973 is a prime.

It is a super-2 number, since 2×42559989² = 3622705327360242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42559919) 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, 5517 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (7097304).

Almost surely, 2^42559989 is an apocalyptic number.

It is an amenable number.

42559989 is a deficient number, since it is larger than the sum of its proper divisors (14218443).

42559989 is a wasteful number, since it uses less digits than its factorization.

42559989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947.

The product of its digits is 1166400, while the sum is 51.

The square root of 42559989 is about 6523.8017290534. The cubic root of 42559989 is about 349.1407193280.

The spelling of 42559989 in words is "forty-two million, five hundred fifty-nine thousand, nine hundred eighty-nine".