442549 has 4 divisors (see below), whose sum is σ = 445036. Its totient is φ = 440064.

The previous prime is 442537. The next prime is 442571. The reversal of 442549 is 945244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 324900 = 343^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 442549 - 2⁵ = 442517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442579) 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, 954 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (111259).

2⁴⁴²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

442549 is a deficient number, since it is larger than the sum of its proper divisors (2487).

442549 is a wasteful number, since it uses less digits than its factorization.

442549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its digits is 5760, while the sum is 28.

The square root of 442549 is about 665.2435644183. The cubic root of 442549 is about 76.2056411344.

The spelling of 442549 in words is "four hundred forty-two thousand, five hundred forty-nine".