542420 has 24 divisors (see below), whose sum is σ = 1171464. Its totient is φ = 210816.

The previous prime is 542401. The next prime is 542441. The reversal of 542420 is 24245.

It can be written as a sum of positive squares in 4 ways, for example, as 315844 + 226576 = 562^2 + 476^2 .

It is a congruent number.

It is an unprimeable number.

542420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374 + ... + 1106.

It is an arithmetic number, because the mean of its divisors is an integer number (48811).

2⁵⁴²⁴²⁰ 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 542420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585732).

542420 is an abundant number, since it is smaller than the sum of its proper divisors (629044).

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

542420 is a wasteful number, since it uses less digits than its factorization.

542420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 777 counting only the distinct ones).

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

The square root of 542420 is about 736.4916835919. The cubic root of 542420 is about 81.5539933535.

Adding to 542420 its reverse (24245), we get a palindrome (566665).

The spelling of 542420 in words is "five hundred forty-two thousand, four hundred twenty".