442647 has 12 divisors (see below), whose sum is σ = 645840. Its totient is φ = 292128.

The previous prime is 442633. The next prime is 442691. The reversal of 442647 is 746244.

It is not a de Polignac number, because 442647 - 2¹² = 438551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1054 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (53820).

2⁴⁴²⁶⁴⁷ is an apocalyptic number.

442647 is a deficient number, since it is larger than the sum of its proper divisors (203193).

442647 is a wasteful number, since it uses less digits than its factorization.

442647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 499 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 442647 is about 665.3172175737. The cubic root of 442647 is about 76.2112658235.

It can be divided in two parts, 442 and 647, that added together give a square (1089 = 33²).

The spelling of 442647 in words is "four hundred forty-two thousand, six hundred forty-seven".