542542 has 32 divisors (see below), whose sum is σ = 1096704. Its totient is φ = 194400.

The previous prime is 542539. The next prime is 542551. The reversal of 542542 is 245245.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a d-powerful number, because it can be written as 5⁷ + 4³ + 5⁸ + 2¹² + 4⁶ + 2¹⁶ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (34272).

2⁵⁴²⁵⁴² is an apocalyptic number.

542542 is an abundant number, since it is smaller than the sum of its proper divisors (554162).

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

542542 is a wasteful number, since it uses less digits than its factorization.

542542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its digits is 1600, while the sum is 22.

The square root of 542542 is about 736.5745040388. The cubic root of 542542 is about 81.5601072144.

Adding to 542542 its reverse (245245), we get a palindrome (787787).

The spelling of 542542 in words is "five hundred forty-two thousand, five hundred forty-two".