42164215 has 4 divisors (see below), whose sum is σ = 50597064. Its totient is φ = 33731368.

The previous prime is 42164207. The next prime is 42164261. The reversal of 42164215 is 51246124.

It is a happy number.

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 42164215 - 2³ = 42164207 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 42164215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4216417 + ... + 4216426.

It is an arithmetic number, because the mean of its divisors is an integer number (12649266).

Almost surely, 2^42164215 is an apocalyptic number.

42164215 is a deficient number, since it is larger than the sum of its proper divisors (8432849).

42164215 is an equidigital number, since it uses as much as digits as its factorization.

42164215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432848.

The product of its digits is 1920, while the sum is 25.

The square root of 42164215 is about 6493.3978008436. The cubic root of 42164215 is about 348.0551036845.

The spelling of 42164215 in words is "forty-two million, one hundred sixty-four thousand, two hundred fifteen".