542780 has 24 divisors (see below), whose sum is σ = 1303008. Its totient is φ = 186048.

The previous prime is 542771. The next prime is 542783. The reversal of 542780 is 87245.

It is a super-2 number, since 2×542780² = 589220256800, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542783) 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, 1799 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (54292).

2⁵⁴²⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

542780 is an abundant number, since it is smaller than the sum of its proper divisors (760228).

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

542780 is a wasteful number, since it uses less digits than its factorization.

542780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893 (or 3891 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 542780 is about 736.7360449985. The cubic root of 542780 is about 81.5720316170.

Subtracting from 542780 its reverse (87245), we obtain a triangular number (455535 = T₉₅₄).

The spelling of 542780 in words is "five hundred forty-two thousand, seven hundred eighty".