545421257 has 2 divisors, whose sum is σ = 545421258. Its totient is φ = 545421256.

The previous prime is 545421187. The next prime is 545421269. The reversal of 545421257 is 752124545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544708921 + 712336 = 23339^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 545421257 - 2²⁸ = 276985801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545421757) 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 as a sum of consecutive naturals, namely, 272710628 + 272710629.

It is an arithmetic number, because the mean of its divisors is an integer number (272710629).

Almost surely, 2^545421257 is an apocalyptic number.

It is an amenable number.

545421257 is a deficient number, since it is larger than the sum of its proper divisors (1).

545421257 is an equidigital number, since it uses as much as digits as its factorization.

545421257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56000, while the sum is 35.

The square root of 545421257 is about 23354.2556507374. The cubic root of 545421257 is about 817.0413189408.

The spelling of 545421257 in words is "five hundred forty-five million, four hundred twenty-one thousand, two hundred fifty-seven".