540503 has 4 divisors (see below), whose sum is σ = 553728. Its totient is φ = 527280.

The previous prime is 540469. The next prime is 540509. The reversal of 540503 is 305045.

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 540503 - 2¹⁰ = 539479 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 (540509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6551 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (138432).

2⁵⁴⁰⁵⁰³ is an apocalyptic number.

540503 is a deficient number, since it is larger than the sum of its proper divisors (13225).

540503 is a wasteful number, since it uses less digits than its factorization.

540503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 540503 is about 735.1890913228. The cubic root of 540503 is about 81.4578049487.

Adding to 540503 its reverse (305045), we get a palindrome (845548).

The spelling of 540503 in words is "five hundred forty thousand, five hundred three".