42618987 has 16 divisors (see below), whose sum is σ = 63794080. Its totient is φ = 28118016.

The previous prime is 42618971. The next prime is 42618991. The reversal of 42618987 is 78981624.

It is not a de Polignac number, because 42618987 - 2⁴ = 42618971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42618937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5518 + ... + 10755.

It is an arithmetic number, because the mean of its divisors is an integer number (3987130).

Almost surely, 2^42618987 is an apocalyptic number.

42618987 is a deficient number, since it is larger than the sum of its proper divisors (21175093).

42618987 is a wasteful number, since it uses less digits than its factorization.

42618987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16379 (or 16373 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 42618987 is about 6528.3219130187. The cubic root of 42618987 is about 349.3019747999.

The spelling of 42618987 in words is "forty-two million, six hundred eighteen thousand, nine hundred eighty-seven".