42512887 has 4 divisors (see below), whose sum is σ = 42639376. Its totient is φ = 42386400.

The previous prime is 42512879. The next prime is 42512891. The reversal of 42512887 is 78821524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42512887 - 2³ = 42512879 is a prime.

It is a super-2 number, since 2×42512887² = 3614691122149538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42512867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62739 + ... + 63412.

It is an arithmetic number, because the mean of its divisors is an integer number (10659844).

Almost surely, 2^42512887 is an apocalyptic number.

42512887 is a deficient number, since it is larger than the sum of its proper divisors (126489).

42512887 is a wasteful number, since it uses less digits than its factorization.

42512887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126488.

The product of its digits is 35840, while the sum is 37.

The square root of 42512887 is about 6520.1907180695. The cubic root of 42512887 is about 349.0118714199.

The spelling of 42512887 in words is "forty-two million, five hundred twelve thousand, eight hundred eighty-seven".