540635 has 4 divisors (see below), whose sum is σ = 648768. Its totient is φ = 432504.

The previous prime is 540629. The next prime is 540677. The reversal of 540635 is 536045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 536045 = 5 ⋅107209.

It is a cyclic number.

It is not a de Polignac number, because 540635 - 2⁴ = 540619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540635.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 54059 + ... + 54068.

It is an arithmetic number, because the mean of its divisors is an integer number (162192).

2⁵⁴⁰⁶³⁵ is an apocalyptic number.

540635 is a deficient number, since it is larger than the sum of its proper divisors (108133).

540635 is a wasteful number, since it uses less digits than its factorization.

540635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108132.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 540635 is about 735.2788586652. The cubic root of 540635 is about 81.4644355348.

Subtracting from 540635 its product of nonzero digits (1800), we obtain a palindrome (538835).

The spelling of 540635 in words is "five hundred forty thousand, six hundred thirty-five".