42445615 has 4 divisors (see below), whose sum is σ = 50934744. Its totient is φ = 33956488.

The previous prime is 42445609. The next prime is 42445621. The reversal of 42445615 is 51654424.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (42445609) and next prime (42445621).

It is a cyclic number.

It is not a de Polignac number, because 42445615 - 2³ = 42445607 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 3 ways as a sum of consecutive naturals, for example, 4244557 + ... + 4244566.

It is an arithmetic number, because the mean of its divisors is an integer number (12733686).

Almost surely, 2^42445615 is an apocalyptic number.

42445615 is a deficient number, since it is larger than the sum of its proper divisors (8489129).

42445615 is an equidigital number, since it uses as much as digits as its factorization.

42445615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489128.

The product of its digits is 19200, while the sum is 31.

The square root of 42445615 is about 6515.0299308599. The cubic root of 42445615 is about 348.8276831784.

The spelling of 42445615 in words is "forty-two million, four hundred forty-five thousand, six hundred fifteen".