542720 has 48 divisors (see below), whose sum is σ = 1326780. Its totient is φ = 212992.

The previous prime is 542719. The next prime is 542723. The reversal of 542720 is 27245.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 1024 = 736^2 + 32^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 542692 and 542701.

It is not an unprimeable number, because it can be changed into a prime (542723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10214 + ... + 10266.

2⁵⁴²⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663390).

542720 is an abundant number, since it is smaller than the sum of its proper divisors (784060).

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

542720 is an equidigital number, since it uses as much as digits as its factorization.

542720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 542720 is about 736.6953237262. The cubic root of 542720 is about 81.5690257938.

Adding to 542720 its reverse (27245), we get a palindrome (569965).

The spelling of 542720 in words is "five hundred forty-two thousand, seven hundred twenty".