42881865 has 32 divisors (see below), whose sum is σ = 76446720. Its totient is φ = 20380416.

The previous prime is 42881819. The next prime is 42881899. The reversal of 42881865 is 56818824.

It is not a de Polignac number, because 42881865 - 2⁶ = 42881801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1864 + ... + 9446.

It is an arithmetic number, because the mean of its divisors is an integer number (2388960).

Almost surely, 2^42881865 is an apocalyptic number.

It is an amenable number.

42881865 is a deficient number, since it is larger than the sum of its proper divisors (33564855).

42881865 is a wasteful number, since it uses less digits than its factorization.

42881865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633.

The product of its digits is 122880, while the sum is 42.

The square root of 42881865 is about 6548.4246197082. The cubic root of 42881865 is about 350.0186792752.

The spelling of 42881865 in words is "forty-two million, eight hundred eighty-one thousand, eight hundred sixty-five".