542393 has 4 divisors (see below), whose sum is σ = 570960. Its totient is φ = 513828.

The previous prime is 542371. The next prime is 542401. The reversal of 542393 is 393245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 393245 = 5 ⋅78649.

It is a cyclic number.

It is not a de Polignac number, because 542393 - 2¹⁰ = 541369 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (542323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14255 + ... + 14292.

It is an arithmetic number, because the mean of its divisors is an integer number (142740).

2⁵⁴²³⁹³ is an apocalyptic number.

It is an amenable number.

542393 is a deficient number, since it is larger than the sum of its proper divisors (28567).

542393 is a wasteful number, since it uses less digits than its factorization.

542393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28566.

The product of its digits is 3240, while the sum is 26.

The square root of 542393 is about 736.4733532179. The cubic root of 542393 is about 81.5526401620.

The spelling of 542393 in words is "five hundred forty-two thousand, three hundred ninety-three".