540263 has 4 divisors (see below), whose sum is σ = 549480. Its totient is φ = 531048.

The previous prime is 540251. The next prime is 540269. The reversal of 540263 is 362045.

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

It is a cyclic number.

It is not a de Polignac number, because 540263 - 2¹⁸ = 278119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4520 + ... + 4637.

It is an arithmetic number, because the mean of its divisors is an integer number (137370).

2⁵⁴⁰²⁶³ is an apocalyptic number.

540263 is a deficient number, since it is larger than the sum of its proper divisors (9217).

540263 is an equidigital number, since it uses as much as digits as its factorization.

540263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9216.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 540263 is about 735.0258498856. The cubic root of 540263 is about 81.4457465713.

The spelling of 540263 in words is "five hundred forty thousand, two hundred sixty-three".