442472581 has 8 divisors (see below), whose sum is σ = 447582464. Its totient is φ = 437374080.

The previous prime is 442472521. The next prime is 442472593. The reversal of 442472581 is 185274244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442472581 - 2⁷ = 442472453 is a prime.

It is a super-2 number, since 2×442472581² = 391563969873603122, which contains 22 as substring.

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 442472581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442472521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93826 + ... + 98428.

It is an arithmetic number, because the mean of its divisors is an integer number (55947808).

Almost surely, 2^442472581 is an apocalyptic number.

It is an amenable number.

442472581 is a deficient number, since it is larger than the sum of its proper divisors (5109883).

442472581 is an equidigital number, since it uses as much as digits as its factorization.

442472581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its digits is 71680, while the sum is 37.

The square root of 442472581 is about 21035.0322319696. The cubic root of 442472581 is about 762.0125450593.

The spelling of 442472581 in words is "four hundred forty-two million, four hundred seventy-two thousand, five hundred eighty-one".