540642 has 8 divisors (see below), whose sum is σ = 1081296. Its totient is φ = 180212.

The previous prime is 540629. The next prime is 540677. The reversal of 540642 is 246045.

It is a happy number.

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

540642 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 540642.

It is an unprimeable number.

540642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45048 + ... + 45059.

It is an arithmetic number, because the mean of its divisors is an integer number (135162).

2⁵⁴⁰⁶⁴² is an apocalyptic number.

540642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

540642 is a wasteful number, since it uses less digits than its factorization.

540642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90112.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 540642 is about 735.2836187486. The cubic root of 540642 is about 81.4647871267.

Adding to 540642 its reverse (246045), we get a palindrome (786687).

The spelling of 540642 in words is "five hundred forty thousand, six hundred forty-two".