1255776449 has 2 divisors, whose sum is σ = 1255776450. Its totient is φ = 1255776448.

The previous prime is 1255776437. The next prime is 1255776463. The reversal of 1255776449 is 9446775521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918393025 + 337383424 = 30305^2 + 18368^2 .

It is an emirp because it is prime and its reverse (9446775521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255776449 - 2⁴ = 1255776433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1255776397 and 1255776406.

It is not a weakly prime, because it can be changed into another prime (1255776419) 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, 627888224 + 627888225.

It is an arithmetic number, because the mean of its divisors is an integer number (627888225).

Almost surely, 2^1255776449 is an apocalyptic number.

It is an amenable number.

1255776449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255776449 is an equidigital number, since it uses as much as digits as its factorization.

1255776449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 50.

The square root of 1255776449 is about 35436.9362247923. The cubic root of 1255776449 is about 1078.8741264951.

The spelling of 1255776449 in words is "one billion, two hundred fifty-five million, seven hundred seventy-six thousand, four hundred forty-nine".