442874681 has 4 divisors (see below), whose sum is σ = 444081792. Its totient is φ = 441667572.

The previous prime is 442874671. The next prime is 442874687. The reversal of 442874681 is 186478244.

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 a de Polignac number, because none of the positive numbers 2^k-442874681 is a prime.

It is a super-2 number, since 2×442874681² = 392275966141703522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442874687) 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, 603005 + ... + 603738.

It is an arithmetic number, because the mean of its divisors is an integer number (111020448).

Almost surely, 2^442874681 is an apocalyptic number.

It is an amenable number.

442874681 is a deficient number, since it is larger than the sum of its proper divisors (1207111).

442874681 is a wasteful number, since it uses less digits than its factorization.

442874681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207110.

The product of its digits is 344064, while the sum is 44.

The square root of 442874681 is about 21044.5879265905. The cubic root of 442874681 is about 762.2433032188.

The spelling of 442874681 in words is "four hundred forty-two million, eight hundred seventy-four thousand, six hundred eighty-one".