542005 has 4 divisors (see below), whose sum is σ = 650412. Its totient is φ = 433600.

The previous prime is 541999. The next prime is 542021. The reversal of 542005 is 500245.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500245 = 5 ⋅100049.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 305809 = 486^2 + 553^2 .

It is a de Polignac number, because none of the positive numbers 2^k-542005 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54196 + ... + 54205.

It is an arithmetic number, because the mean of its divisors is an integer number (162603).

2⁵⁴²⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

542005 is a deficient number, since it is larger than the sum of its proper divisors (108407).

542005 is a wasteful number, since it uses less digits than its factorization.

542005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108406.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 542005 is about 736.2098885508. The cubic root of 542005 is about 81.5331893379.

The spelling of 542005 in words is "five hundred forty-two thousand, five".