42665215 has 16 divisors (see below), whose sum is σ = 53184096. Its totient is φ = 32832000.

The previous prime is 42665209. The next prime is 42665239. The reversal of 42665215 is 51256624.

It is a de Polignac number, because none of the positive numbers 2^k-42665215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13540 + ... + 16390.

It is an arithmetic number, because the mean of its divisors is an integer number (3324006).

Almost surely, 2^42665215 is an apocalyptic number.

42665215 is a deficient number, since it is larger than the sum of its proper divisors (10518881).

42665215 is a wasteful number, since it uses less digits than its factorization.

42665215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970.

The product of its digits is 14400, while the sum is 31.

The square root of 42665215 is about 6531.8615263951. The cubic root of 42665215 is about 349.4282228882.

The spelling of 42665215 in words is "forty-two million, six hundred sixty-five thousand, two hundred fifteen".