542842 has 8 divisors (see below), whose sum is σ = 818100. Its totient is φ = 270144.

The previous prime is 542837. The next prime is 542873. The reversal of 542842 is 248245.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 68121 = 689^2 + 261^2 .

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

Its product of digits (2560) is a multiple of the sum of its prime divisors (1280).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34 + ... + 1042.

2⁵⁴²⁸⁴² is an apocalyptic number.

542842 is a deficient number, since it is larger than the sum of its proper divisors (275258).

542842 is a wasteful number, since it uses less digits than its factorization.

542842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 2560, while the sum is 25.

The square root of 542842 is about 736.7781212821. The cubic root of 542842 is about 81.5751374017.

The spelling of 542842 in words is "five hundred forty-two thousand, eight hundred forty-two".