257455273 has 2 divisors, whose sum is σ = 257455274. Its totient is φ = 257455272.

The previous prime is 257455249. The next prime is 257455309. The reversal of 257455273 is 372554752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143328784 + 114126489 = 11972^2 + 10683^2 .

It is a cyclic number.

It is not a de Polignac number, because 257455273 - 2⁵ = 257455241 is a prime.

It is not a weakly prime, because it can be changed into another prime (257455223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128727636 + 128727637.

It is an arithmetic number, because the mean of its divisors is an integer number (128727637).

Almost surely, 2^257455273 is an apocalyptic number.

It is an amenable number.

257455273 is a deficient number, since it is larger than the sum of its proper divisors (1).

257455273 is an equidigital number, since it uses as much as digits as its factorization.

257455273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294000, while the sum is 40.

The square root of 257455273 is about 16045.4128335796. The cubic root of 257455273 is about 636.1613261425.

The spelling of 257455273 in words is "two hundred fifty-seven million, four hundred fifty-five thousand, two hundred seventy-three".