540499 has 4 divisors (see below), whose sum is σ = 549720. Its totient is φ = 531280.

The previous prime is 540469. The next prime is 540509. The reversal of 540499 is 994045.

It is a happy number.

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 540499 - 2¹³ = 532307 is a prime.

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 a Duffinian number.

540499 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 540499.

It is not an unprimeable number, because it can be changed into a prime (540469) 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, 4522 + ... + 4639.

It is an arithmetic number, because the mean of its divisors is an integer number (137430).

2⁵⁴⁰⁴⁹⁹ is an apocalyptic number.

540499 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

540499 is a deficient number, since it is larger than the sum of its proper divisors (9221).

540499 is an equidigital number, since it uses as much as digits as its factorization.

540499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9220.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 540499 is about 735.1863709292. The cubic root of 540499 is about 81.4576040050.

It can be divided in two parts, 5 and 40499, that added together give a palindrome (40504).

The spelling of 540499 in words is "five hundred forty thousand, four hundred ninety-nine".