442045 has 8 divisors (see below), whose sum is σ = 534240. Its totient is φ = 351120.

The previous prime is 442033. The next prime is 442061. The reversal of 442045 is 540244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-442045 is a prime.

442045 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846 + ... + 1264.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2⁴⁴²⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

442045 is a deficient number, since it is larger than the sum of its proper divisors (92195).

442045 is a wasteful number, since it uses less digits than its factorization.

442045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 442045 is about 664.8646478796. The cubic root of 442045 is about 76.1767010376.

Adding to 442045 its reverse (540244), we get a palindrome (982289).

It can be divided in two parts, 4420 and 45, that added together give a triangular number (4465 = T₉₄).

The spelling of 442045 in words is "four hundred forty-two thousand, forty-five".