540407 has 4 divisors (see below), whose sum is σ = 617616. Its totient is φ = 463200.

The previous prime is 540391. The next prime is 540433. The reversal of 540407 is 704045.

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 540407 - 2⁴ = 540391 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 (540437) 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 in 3 ways as a sum of consecutive naturals, for example, 38594 + ... + 38607.

It is an arithmetic number, because the mean of its divisors is an integer number (154404).

2⁵⁴⁰⁴⁰⁷ is an apocalyptic number.

540407 is a deficient number, since it is larger than the sum of its proper divisors (77209).

540407 is an equidigital number, since it uses as much as digits as its factorization.

540407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77208.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 540407 is about 735.1237990978. The cubic root of 540407 is about 81.4529820262.

The spelling of 540407 in words is "five hundred forty thousand, four hundred seven".