1255144217 has 2 divisors, whose sum is σ = 1255144218. Its totient is φ = 1255144216.

The previous prime is 1255144211. The next prime is 1255144279. The reversal of 1255144217 is 7124415521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243338121 + 11806096 = 35261^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255144217 - 2²⁴ = 1238367001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255144211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627572108 + 627572109.

It is an arithmetic number, because the mean of its divisors is an integer number (627572109).

Almost surely, 2^1255144217 is an apocalyptic number.

It is an amenable number.

1255144217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255144217 is an equidigital number, since it uses as much as digits as its factorization.

1255144217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 1255144217 is about 35428.0145788612. The cubic root of 1255144217 is about 1078.6930397927.

Adding to 1255144217 its reverse (7124415521), we get a palindrome (8379559738).

The spelling of 1255144217 in words is "one billion, two hundred fifty-five million, one hundred forty-four thousand, two hundred seventeen".