542404 has 6 divisors (see below), whose sum is σ = 949214. Its totient is φ = 271200.

The previous prime is 542401. The next prime is 542441. The reversal of 542404 is 404245.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 122500 = 648^2 + 350^2 .

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (542401) 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 as a sum of consecutive naturals, namely, 67797 + ... + 67804.

2⁵⁴²⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

542404 is a deficient number, since it is larger than the sum of its proper divisors (406810).

542404 is a wasteful number, since it uses less digits than its factorization.

542404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135605 (or 135603 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 542404 is about 736.4808212031. The cubic root of 542404 is about 81.5531914676.

Adding to 542404 its reverse (404245), we get a palindrome (946649).

It can be divided in two parts, 542 and 404, that added together give a triangular number (946 = T₄₃).

The spelling of 542404 in words is "five hundred forty-two thousand, four hundred four".