442560641 has 4 divisors (see below), whose sum is σ = 461802432. Its totient is φ = 423318852.

The previous prime is 442560577. The next prime is 442560649. The reversal of 442560641 is 146065244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442560641 - 2⁶ = 442560577 is a prime.

It is a super-4 number, since 4×442560641⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 442560598 and 442560607.

It is not an unprimeable number, because it can be changed into a prime (442560649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9620861 + ... + 9620906.

It is an arithmetic number, because the mean of its divisors is an integer number (115450608).

Almost surely, 2^442560641 is an apocalyptic number.

It is an amenable number.

442560641 is a deficient number, since it is larger than the sum of its proper divisors (19241791).

442560641 is a wasteful number, since it uses less digits than its factorization.

442560641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19241790.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 442560641 is about 21037.1253026643. The cubic root of 442560641 is about 762.0630931057.

The spelling of 442560641 in words is "four hundred forty-two million, five hundred sixty thousand, six hundred forty-one".