540651 has 8 divisors (see below), whose sum is σ = 763344. Its totient is φ = 339200.

The previous prime is 540629. The next prime is 540677. The reversal of 540651 is 156045.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 540651 - 2⁵ = 540619 is a prime.

540651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (540611) 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 7 ways as a sum of consecutive naturals, for example, 5250 + ... + 5351.

It is an arithmetic number, because the mean of its divisors is an integer number (95418).

2⁵⁴⁰⁶⁵¹ is an apocalyptic number.

540651 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

540651 is a deficient number, since it is larger than the sum of its proper divisors (222693).

540651 is a wasteful number, since it uses less digits than its factorization.

540651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 540651 is about 735.2897388105. The cubic root of 540651 is about 81.4652391689.

Adding to 540651 its reverse (156045), we get a palindrome (696696).

The spelling of 540651 in words is "five hundred forty thousand, six hundred fifty-one".