542444 has 12 divisors (see below), whose sum is σ = 1084944. Its totient is φ = 232464.

The previous prime is 542441. The next prime is 542447. The reversal of 542444 is 444245.

It is an interprime number because it is at equal distance from previous prime (542441) and next prime (542447).

542444 is an admirable number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 542444.

It is not an unprimeable number, because it can be changed into a prime (542441) 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, 9659 + ... + 9714.

It is an arithmetic number, because the mean of its divisors is an integer number (90412).

2⁵⁴²⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

542444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542444 is a wasteful number, since it uses less digits than its factorization.

542444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19384 (or 19382 counting only the distinct ones).

The product of its digits is 2560, while the sum is 23.

The square root of 542444 is about 736.5079768747. The cubic root of 542444 is about 81.5551961526. Note that the first 3 decimals are identical.

Adding to 542444 its reverse (444245), we get a palindrome (986689).

The spelling of 542444 in words is "five hundred forty-two thousand, four hundred forty-four".