1255549 has 2 divisors, whose sum is σ = 1255550. Its totient is φ = 1255548.

The previous prime is 1255519. The next prime is 1255559. The reversal of 1255549 is 9455521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 5625 = 1118^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255549 - 2⁷ = 1255421 is a prime.

1255549 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627774 + 627775.

It is an arithmetic number, because the mean of its divisors is an integer number (627775).

2^1255549 is an apocalyptic number.

It is an amenable number.

1255549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255549 is an equidigital number, since it uses as much as digits as its factorization.

1255549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 1255549 is about 1120.5128290207. The cubic root of 1255549 is about 107.8808986542.

The spelling of 1255549 in words is "one million, two hundred fifty-five thousand, five hundred forty-nine".