442847 has 4 divisors (see below), whose sum is σ = 446880. Its totient is φ = 438816.

The previous prime is 442843. The next prime is 442861. The reversal of 442847 is 748244.

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

It is a cyclic number.

It is not a de Polignac number, because 442847 - 2² = 442843 is a prime.

It is a super-2 number, since 2×442847² = 392226930818, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442843) 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, 1847 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (111720).

2⁴⁴²⁸⁴⁷ is an apocalyptic number.

442847 is a deficient number, since it is larger than the sum of its proper divisors (4033).

442847 is a wasteful number, since it uses less digits than its factorization.

442847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032.

The product of its digits is 7168, while the sum is 29.

The square root of 442847 is about 665.4675048415. The cubic root of 442847 is about 76.2227422055. Note that the first 3 decimals are identical.

The spelling of 442847 in words is "four hundred forty-two thousand, eight hundred forty-seven".