1255801 has 2 divisors, whose sum is σ = 1255802. Its totient is φ = 1255800.

The previous prime is 1255799. The next prime is 1255811. The reversal of 1255801 is 1085521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 89401 = 1080^2 + 299^2 .

It is an emirp because it is prime and its reverse (1085521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255801 - 2¹ = 1255799 is a prime.

Together with 1255799, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1255811) 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, 627900 + 627901.

It is an arithmetic number, because the mean of its divisors is an integer number (627901).

2^1255801 is an apocalyptic number.

It is an amenable number.

1255801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255801 is an equidigital number, since it uses as much as digits as its factorization.

1255801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1255801 is about 1120.6252718907. The cubic root of 1255801 is about 107.8881157276. Note that the first 3 decimals are identical.

The spelling of 1255801 in words is "one million, two hundred fifty-five thousand, eight hundred one".