540542 has 4 divisors (see below), whose sum is σ = 810816. Its totient is φ = 270270.

The previous prime is 540541. The next prime is 540557. The reversal of 540542 is 245045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245045 = 5 ⋅49009.

It is a d-powerful number, because it can be written as 5⁴ + 4 + 5⁶ + 0 + 4⁹ + 2¹⁸ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135134 + ... + 135137.

It is an arithmetic number, because the mean of its divisors is an integer number (202704).

2⁵⁴⁰⁵⁴² is an apocalyptic number.

540542 is a deficient number, since it is larger than the sum of its proper divisors (270274).

540542 is a wasteful number, since it uses less digits than its factorization.

540542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270273.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 540542 is about 735.2156146329. The cubic root of 540542 is about 81.4597640979.

Adding to 540542 its reverse (245045), we get a palindrome (785587).

The spelling of 540542 in words is "five hundred forty thousand, five hundred forty-two".