255748249 has 2 divisors, whose sum is σ = 255748250. Its totient is φ = 255748248.

The previous prime is 255748243. The next prime is 255748307. The reversal of 255748249 is 942847552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252015625 + 3732624 = 15875^2 + 1932^2 .

It is a cyclic number.

It is not a de Polignac number, because 255748249 - 2⁷ = 255748121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255748199 and 255748208.

It is not a weakly prime, because it can be changed into another prime (255748243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127874124 + 127874125.

It is an arithmetic number, because the mean of its divisors is an integer number (127874125).

Almost surely, 2^255748249 is an apocalyptic number.

It is an amenable number.

255748249 is a deficient number, since it is larger than the sum of its proper divisors (1).

255748249 is an equidigital number, since it uses as much as digits as its factorization.

255748249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The square root of 255748249 is about 15992.1308461380. The cubic root of 255748249 is about 634.7522119994.

The spelling of 255748249 in words is "two hundred fifty-five million, seven hundred forty-eight thousand, two hundred forty-nine".