540851 has 2 divisors, whose sum is σ = 540852. Its totient is φ = 540850.

The previous prime is 540823. The next prime is 540863. The reversal of 540851 is 158045.

Added to its reverse (158045) it gives a square (698896 = 836²).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540851 is a prime.

It is not a weakly prime, because it can be changed into another prime (540871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270425 + 270426.

It is an arithmetic number, because the mean of its divisors is an integer number (270426).

2⁵⁴⁰⁸⁵¹ is an apocalyptic number.

540851 is a deficient number, since it is larger than the sum of its proper divisors (1).

540851 is an equidigital number, since it uses as much as digits as its factorization.

540851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 540851 is about 735.4257270452. The cubic root of 540851 is about 81.4752832572.

Adding to 540851 its reverse (158045), we get a palindrome (698896).

The spelling of 540851 in words is "five hundred forty thousand, eight hundred fifty-one".