42987518 has 32 divisors (see below), whose sum is σ = 76101120. Its totient is φ = 17831520.

The previous prime is 42987517. The next prime is 42987521. The reversal of 42987518 is 81578924.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42987517) 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, 58280 + ... + 59012.

It is an arithmetic number, because the mean of its divisors is an integer number (2378160).

Almost surely, 2^42987518 is an apocalyptic number.

42987518 is a deficient number, since it is larger than the sum of its proper divisors (33113602).

42987518 is a wasteful number, since it uses less digits than its factorization.

42987518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872.

The product of its digits is 161280, while the sum is 44.

The square root of 42987518 is about 6556.4867116467. The cubic root of 42987518 is about 350.3059039871.

The spelling of 42987518 in words is "forty-two million, nine hundred eighty-seven thousand, five hundred eighteen".