542006 has 4 divisors (see below), whose sum is σ = 813012. Its totient is φ = 271002.

The previous prime is 541999. The next prime is 542021. The reversal of 542006 is 600245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 600245 = 5 ⋅120049.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

542006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135500 + ... + 135503.

It is an arithmetic number, because the mean of its divisors is an integer number (203253).

2⁵⁴²⁰⁰⁶ is an apocalyptic number.

542006 is a deficient number, since it is larger than the sum of its proper divisors (271006).

542006 is a wasteful number, since it uses less digits than its factorization.

542006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271005.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 542006 is about 736.2105677046. The cubic root of 542006 is about 81.5332394808.

The spelling of 542006 in words is "five hundred forty-two thousand, six".