542687 has 2 divisors, whose sum is σ = 542688. Its totient is φ = 542686.

The previous prime is 542683. The next prime is 542693. The reversal of 542687 is 786245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542687 - 2² = 542683 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271343 + 271344.

It is an arithmetic number, because the mean of its divisors is an integer number (271344).

2⁵⁴²⁶⁸⁷ is an apocalyptic number.

542687 is a deficient number, since it is larger than the sum of its proper divisors (1).

542687 is an equidigital number, since it uses as much as digits as its factorization.

542687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 542687 is about 736.6729260669. The cubic root of 542687 is about 81.5673724966.

The spelling of 542687 in words is "five hundred forty-two thousand, six hundred eighty-seven".