542636 has 12 divisors (see below), whose sum is σ = 954912. Its totient is φ = 269808.

The previous prime is 542603. The next prime is 542683. The reversal of 542636 is 636245.

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁵ + 4⁴ + 6 + 2⁵ + 3¹² + 6⁵ .

It is an unprimeable number.

542636 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 in 3 ways as a sum of consecutive naturals, for example, 941 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (79576).

2⁵⁴²⁶³⁶ is an apocalyptic number.

It is an amenable number.

542636 is a deficient number, since it is larger than the sum of its proper divisors (412276).

542636 is a wasteful number, since it uses less digits than its factorization.

542636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 758 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 542636 is about 736.6383101631. The cubic root of 542636 is about 81.5648172690.

The spelling of 542636 in words is "five hundred forty-two thousand, six hundred thirty-six".