42442655 has 4 divisors (see below), whose sum is σ = 50931192. Its totient is φ = 33954120.

The previous prime is 42442651. The next prime is 42442657. The reversal of 42442655 is 55624424.

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

It is not a de Polignac number, because 42442655 - 2² = 42442651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442651) by changing a digit.

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, 4244261 + ... + 4244270.

It is an arithmetic number, because the mean of its divisors is an integer number (12732798).

Almost surely, 2^42442655 is an apocalyptic number.

42442655 is a deficient number, since it is larger than the sum of its proper divisors (8488537).

42442655 is an equidigital number, since it uses as much as digits as its factorization.

42442655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488536.

The product of its digits is 38400, while the sum is 32.

The square root of 42442655 is about 6514.8027598693. The cubic root of 42442655 is about 348.8195743397.

The spelling of 42442655 in words is "forty-two million, four hundred forty-two thousand, six hundred fifty-five".