442160405 has 4 divisors (see below), whose sum is σ = 530592492. Its totient is φ = 353728320.

The previous prime is 442160401. The next prime is 442160423. The reversal of 442160405 is 504061244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71944324 + 370216081 = 8482^2 + 19241^2 .

It is not a de Polignac number, because 442160405 - 2² = 442160401 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 (442160401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44216036 + ... + 44216045.

It is an arithmetic number, because the mean of its divisors is an integer number (132648123).

Almost surely, 2^442160405 is an apocalyptic number.

It is an amenable number.

442160405 is a deficient number, since it is larger than the sum of its proper divisors (88432087).

442160405 is an equidigital number, since it uses as much as digits as its factorization.

442160405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88432086.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 442160405 is about 21027.6105394788. The cubic root of 442160405 is about 761.8332962919.

The spelling of 442160405 in words is "four hundred forty-two million, one hundred sixty thousand, four hundred five".