542823 has 8 divisors (see below), whose sum is σ = 755328. Its totient is φ = 346104.

The previous prime is 542821. The next prime is 542831. The reversal of 542823 is 328245.

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

It is not a de Polignac number, because 542823 - 2¹ = 542821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542793 and 542802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542821) 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, 3865 + ... + 4002.

It is an arithmetic number, because the mean of its divisors is an integer number (94416).

2⁵⁴²⁸²³ is an apocalyptic number.

542823 is a deficient number, since it is larger than the sum of its proper divisors (212505).

542823 is a wasteful number, since it uses less digits than its factorization.

542823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893.

The product of its digits is 1920, while the sum is 24.

The square root of 542823 is about 736.7652271925. The cubic root of 542823 is about 81.5741856541.

It can be divided in two parts, 54282 and 3, that added together give a triangular number (54285 = T₃₂₉).

The spelling of 542823 in words is "five hundred forty-two thousand, eight hundred twenty-three".