42512987 has 6 divisors (see below), whose sum is σ = 46729284. Its totient is φ = 38648060.

The previous prime is 42512983. The next prime is 42512989. The reversal of 42512987 is 78921524.

It is not a de Polignac number, because 42512987 - 2² = 42512983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42512987.

It is not an unprimeable number, because it can be changed into a prime (42512983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175553 + ... + 175794.

It is an arithmetic number, because the mean of its divisors is an integer number (7788214).

Almost surely, 2^42512987 is an apocalyptic number.

42512987 is a deficient number, since it is larger than the sum of its proper divisors (4216297).

42512987 is a wasteful number, since it uses less digits than its factorization.

42512987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351369 (or 351358 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 42512987 is about 6520.1983865524. The cubic root of 42512987 is about 349.0121450715.

The spelling of 42512987 in words is "forty-two million, five hundred twelve thousand, nine hundred eighty-seven".