542240 has 24 divisors (see below), whose sum is σ = 1281420. Its totient is φ = 216832.

The previous prime is 542237. The next prime is 542251. The reversal of 542240 is 42245.

It can be written as a sum of positive squares in 2 ways, for example, as 512656 + 29584 = 716^2 + 172^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 1854.

2⁵⁴²²⁴⁰ is an apocalyptic number.

It is an amenable number.

542240 is an abundant number, since it is smaller than the sum of its proper divisors (739180).

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

542240 is a wasteful number, since it uses less digits than its factorization.

542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 542240 is about 736.3694724797. The cubic root of 542240 is about 81.5449712286.

Adding to 542240 its reverse (42245), we get a palindrome (584485).

The spelling of 542240 in words is "five hundred forty-two thousand, two hundred forty".