542642 has 8 divisors (see below), whose sum is σ = 836076. Its totient is φ = 263952.

The previous prime is 542603. The next prime is 542683. The reversal of 542642 is 246245.

It can be written as a sum of positive squares in 2 ways, for example, as 534361 + 8281 = 731^2 + 91^2 .

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

It is an unprimeable number.

542642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3593 + ... + 3740.

2⁵⁴²⁶⁴² is an apocalyptic number.

542642 is a deficient number, since it is larger than the sum of its proper divisors (293434).

542642 is a wasteful number, since it uses less digits than its factorization.

542642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372.

The product of its digits is 1920, while the sum is 23.

The square root of 542642 is about 736.6423827068. The cubic root of 542642 is about 81.5651178923.

Adding to 542642 its reverse (246245), we get a palindrome (788887).

The spelling of 542642 in words is "five hundred forty-two thousand, six hundred forty-two".