542791 has 2 divisors, whose sum is σ = 542792. Its totient is φ = 542790.

The previous prime is 542783. The next prime is 542797. The reversal of 542791 is 197245.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542791 - 2³ = 542783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271395 + 271396.

It is an arithmetic number, because the mean of its divisors is an integer number (271396).

2⁵⁴²⁷⁹¹ is an apocalyptic number.

542791 is a deficient number, since it is larger than the sum of its proper divisors (1).

542791 is an equidigital number, since it uses as much as digits as its factorization.

542791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 542791 is about 736.7435103209. The cubic root of 542791 is about 81.5725826606.

The spelling of 542791 in words is "five hundred forty-two thousand, seven hundred ninety-one".