540665 has 8 divisors (see below), whose sum is σ = 658368. Its totient is φ = 426160.

The previous prime is 540629. The next prime is 540677. The reversal of 540665 is 566045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540665 - 2¹⁰ = 539641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 7.

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 7 ways as a sum of consecutive naturals, for example, 407 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (82296).

2⁵⁴⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

540665 is a deficient number, since it is larger than the sum of its proper divisors (117703).

540665 is a wasteful number, since it uses less digits than its factorization.

540665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 540665 is about 735.2992588056. The cubic root of 540665 is about 81.4659423357.

The spelling of 540665 in words is "five hundred forty thousand, six hundred sixty-five".