540681 has 8 divisors (see below), whose sum is σ = 740544. Its totient is φ = 350640.

The previous prime is 540679. The next prime is 540689. The reversal of 540681 is 186045.

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

It is not a de Polignac number, because 540681 - 2¹ = 540679 is a prime.

It is a super-2 number, since 2×540681² = 584671887522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (540689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2325 + ... + 2546.

It is an arithmetic number, because the mean of its divisors is an integer number (92568).

2⁵⁴⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

540681 is a deficient number, since it is larger than the sum of its proper divisors (199863).

540681 is a wasteful number, since it uses less digits than its factorization.

540681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 540681 is about 735.3101386490. The cubic root of 540681 is about 81.4667459400.

It can be divided in two parts, 540 and 681, that added together give a palindrome (1221).

The spelling of 540681 in words is "five hundred forty thousand, six hundred eighty-one".