542042239 has 2 divisors, whose sum is σ = 542042240. Its totient is φ = 542042238.

The previous prime is 542042233. The next prime is 542042273. The reversal of 542042239 is 932240245.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542042239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542042239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542042233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271021119 + 271021120.

It is an arithmetic number, because the mean of its divisors is an integer number (271021120).

Almost surely, 2^542042239 is an apocalyptic number.

542042239 is a deficient number, since it is larger than the sum of its proper divisors (1).

542042239 is an equidigital number, since it uses as much as digits as its factorization.

542042239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 542042239 is about 23281.8005961738. The cubic root of 542042239 is about 815.3505656846.

The spelling of 542042239 in words is "five hundred forty-two million, forty-two thousand, two hundred thirty-nine".