542668 has 12 divisors (see below), whose sum is σ = 1085392. Its totient is φ = 232560.

The previous prime is 542603. The next prime is 542683. The reversal of 542668 is 866245.

542668 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

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, 9663 + ... + 9718.

2⁵⁴²⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

542668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542668 is a wasteful number, since it uses less digits than its factorization.

542668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19392 (or 19390 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 542668 is about 736.6600301360. The cubic root of 542668 is about 81.5664205677.

The spelling of 542668 in words is "five hundred forty-two thousand, six hundred sixty-eight".