545291 has 2 divisors, whose sum is σ = 545292. Its totient is φ = 545290.

The previous prime is 545267. The next prime is 545329. The reversal of 545291 is 192545.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545291 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 545291.

It is not a weakly prime, because it can be changed into another prime (545231) 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, 272645 + 272646.

It is an arithmetic number, because the mean of its divisors is an integer number (272646).

2⁵⁴⁵²⁹¹ is an apocalyptic number.

545291 is a deficient number, since it is larger than the sum of its proper divisors (1).

545291 is an equidigital number, since it uses as much as digits as its factorization.

545291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 545291 is about 738.4382167792. The cubic root of 545291 is about 81.6976272078.

The spelling of 545291 in words is "five hundred forty-five thousand, two hundred ninety-one".