442401 has 16 divisors (see below), whose sum is σ = 626688. Its totient is φ = 277200.

The previous prime is 442399. The next prime is 442439. The reversal of 442401 is 104244.

It is not a de Polignac number, because 442401 - 2¹ = 442399 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (442201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6196 + ... + 6266.

It is an arithmetic number, because the mean of its divisors is an integer number (39168).

2⁴⁴²⁴⁰¹ is an apocalyptic number.

It is an amenable number.

442401 is a deficient number, since it is larger than the sum of its proper divisors (184287).

442401 is a wasteful number, since it uses less digits than its factorization.

442401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 442401 is about 665.1323176632. The cubic root of 442401 is about 76.1971451318.

Adding to 442401 its reverse (104244), we get a palindrome (546645).

The spelling of 442401 in words is "four hundred forty-two thousand, four hundred one", and thus it is an iban number.