442172573 has 4 divisors (see below), whose sum is σ = 442240380. Its totient is φ = 442104768.

The previous prime is 442172557. The next prime is 442172611. The reversal of 442172573 is 375271244.

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 322094809 + 120077764 = 17947^2 + 10958^2 .

It is a cyclic number.

It is not a de Polignac number, because 442172573 - 2⁴ = 442172557 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 (442172513) 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, 22940 + ... + 37557.

It is an arithmetic number, because the mean of its divisors is an integer number (110560095).

Almost surely, 2^442172573 is an apocalyptic number.

It is an amenable number.

442172573 is a deficient number, since it is larger than the sum of its proper divisors (67807).

442172573 is an equidigital number, since it uses as much as digits as its factorization.

442172573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67806.

The product of its digits is 47040, while the sum is 35.

The square root of 442172573 is about 21027.8998713614. The cubic root of 442172573 is about 761.8402846325.

The spelling of 442172573 in words is "four hundred forty-two million, one hundred seventy-two thousand, five hundred seventy-three".