542408 has 8 divisors (see below), whose sum is σ = 1017030. Its totient is φ = 271200.

The previous prime is 542401. The next prime is 542441. The reversal of 542408 is 804245.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 77284 = 682^2 + 278^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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.

542408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 33893 + ... + 33908.

2⁵⁴²⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

542408 is a deficient number, since it is larger than the sum of its proper divisors (474622).

542408 is a wasteful number, since it uses less digits than its factorization.

542408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67807 (or 67803 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 542408 is about 736.4835368153. The cubic root of 542408 is about 81.5533919406.

The spelling of 542408 in words is "five hundred forty-two thousand, four hundred eight".