542778 has 16 divisors (see below), whose sum is σ = 1104096. Its totient is φ = 177840.

The previous prime is 542771. The next prime is 542783. The reversal of 542778 is 877245.

It is not an unprimeable number, because it can be changed into a prime (542771) 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 in 7 ways as a sum of consecutive naturals, for example, 376 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (69006).

2⁵⁴²⁷⁷⁸ is an apocalyptic number.

542778 is an abundant number, since it is smaller than the sum of its proper divisors (561318).

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

542778 is a wasteful number, since it uses less digits than its factorization.

542778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549.

The product of its digits is 15680, while the sum is 33.

The square root of 542778 is about 736.7346876590. The cubic root of 542778 is about 81.5719314265.

It can be divided in two parts, 54277 and 8, that added together give a triangular number (54285 = T₃₂₉).

The spelling of 542778 in words is "five hundred forty-two thousand, seven hundred seventy-eight".