542731 has 8 divisors (see below), whose sum is σ = 647424. Its totient is φ = 444840.

The previous prime is 542723. The next prime is 542747. The reversal of 542731 is 137245.

542731 is nontrivially palindromic in base 6.

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

It is a cyclic number.

It is not a de Polignac number, because 542731 - 2³ = 542723 is a prime.

It is a super-2 number, since 2×542731² = 589113876722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1525 + ... + 1846.

It is an arithmetic number, because the mean of its divisors is an integer number (80928).

2⁵⁴²⁷³¹ is an apocalyptic number.

542731 is a deficient number, since it is larger than the sum of its proper divisors (104693).

542731 is a wasteful number, since it uses less digits than its factorization.

542731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401.

The product of its digits is 840, while the sum is 22.

The square root of 542731 is about 736.7027894613. The cubic root of 542731 is about 81.5695768780.

Adding to 542731 its reverse (137245), we get a palindrome (679976).

The spelling of 542731 in words is "five hundred forty-two thousand, seven hundred thirty-one".