542578 has 4 divisors (see below), whose sum is σ = 813870. Its totient is φ = 271288.

The previous prime is 542567. The next prime is 542579. The reversal of 542578 is 875245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 154449 = 623^2 + 393^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (542579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135643 + ... + 135646.

2⁵⁴²⁵⁷⁸ is an apocalyptic number.

542578 is a deficient number, since it is larger than the sum of its proper divisors (271292).

542578 is a wasteful number, since it uses less digits than its factorization.

542578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271291.

The product of its digits is 11200, while the sum is 31.

The square root of 542578 is about 736.5989410799. The cubic root of 542578 is about 81.5619111294.

The spelling of 542578 in words is "five hundred forty-two thousand, five hundred seventy-eight".