1255321 has 2 divisors, whose sum is σ = 1255322. Its totient is φ = 1255320.

The previous prime is 1255313. The next prime is 1255333. The reversal of 1255321 is 1235521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 129600 = 1061^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255321 - 2³ = 1255313 is a prime.

It is a pancake number, because a pancake can be divided into 1255321 parts by 1584 straight cuts.

It is not a weakly prime, because it can be changed into another prime (1255301) 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, 627660 + 627661.

It is an arithmetic number, because the mean of its divisors is an integer number (627661).

2^1255321 is an apocalyptic number.

It is an amenable number.

1255321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255321 is an equidigital number, since it uses as much as digits as its factorization.

1255321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 19.

The square root of 1255321 is about 1120.4110852718. The cubic root of 1255321 is about 107.8743680890.

The spelling of 1255321 in words is "one million, two hundred fifty-five thousand, three hundred twenty-one".