542431 has 4 divisors (see below), whose sum is σ = 571000. Its totient is φ = 513864.

The previous prime is 542401. The next prime is 542441. The reversal of 542431 is 134245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134245 = 5 ⋅26849.

It is a cyclic number.

It is not a de Polignac number, because 542431 - 2¹¹ = 540383 is a prime.

It is a super-2 number, since 2×542431² = 588462779522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 28549 = 542431 / (5 + 4 + 2 + 4 + 3 + 1).

It is a d-powerful number, because it can be written as 5 + 4⁵ + 4⁷ + 2¹⁹ + 3⁶ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542399 and 542408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14256 + ... + 14293.

It is an arithmetic number, because the mean of its divisors is an integer number (142750).

2⁵⁴²⁴³¹ is an apocalyptic number.

542431 is a deficient number, since it is larger than the sum of its proper divisors (28569).

542431 is a wasteful number, since it uses less digits than its factorization.

542431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28568.

The product of its digits is 480, while the sum is 19.

The square root of 542431 is about 736.4991513912. The cubic root of 542431 is about 81.5545446408.

Adding to 542431 its reverse (134245), we get a palindrome (676676).

It can be divided in two parts, 54 and 2431, that added together give a triangular number (2485 = T₇₀).

The spelling of 542431 in words is "five hundred forty-two thousand, four hundred thirty-one".