540945 has 16 divisors (see below), whose sum is σ = 961920. Its totient is φ = 288432.

The previous prime is 540907. The next prime is 540961. The reversal of 540945 is 549045.

It is not a de Polignac number, because 540945 - 2⁸ = 540689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 15 and base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1869 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (60120).

2⁵⁴⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

540945 is a deficient number, since it is larger than the sum of its proper divisors (420975).

540945 is a wasteful number, since it uses less digits than its factorization.

540945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 540945 is about 735.4896328297. The cubic root of 540945 is about 81.4800031234.

Subtracting 540945 from its reverse (549045), we obtain a square (8100 = 90²).

It can be divided in two parts, 540 and 945, that added together give a triangular number (1485 = T₅₄).

The spelling of 540945 in words is "five hundred forty thousand, nine hundred forty-five".