545257 has 2 divisors, whose sum is σ = 545258. Its totient is φ = 545256.

The previous prime is 545239. The next prime is 545267. The reversal of 545257 is 752545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430336 + 114921 = 656^2 + 339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545257 is a prime.

It is not a weakly prime, because it can be changed into another prime (545267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272628 + 272629.

It is an arithmetic number, because the mean of its divisors is an integer number (272629).

2⁵⁴⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

545257 is a deficient number, since it is larger than the sum of its proper divisors (1).

545257 is an equidigital number, since it uses as much as digits as its factorization.

545257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 28.

The square root of 545257 is about 738.4151948599. The cubic root of 545257 is about 81.6959291683.

The spelling of 545257 in words is "five hundred forty-five thousand, two hundred fifty-seven".