1255257 has 10 divisors (see below), whose sum is σ = 1875258. Its totient is φ = 836784.

The previous prime is 1255253. The next prime is 1255259. The reversal of 1255257 is 7525521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 9801 = 1116^2 + 99^2 .

It is not a de Polignac number, because 1255257 - 2² = 1255253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 1 + 2¹⁸ + 5² + 5⁷ + 2¹⁹ + 5⁸ + 7² .

It is a self number, because there is not a number n which added to its sum of digits gives 1255257.

It is not an unprimeable number, because it can be changed into a prime (1255253) 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 in 9 ways as a sum of consecutive naturals, for example, 7668 + ... + 7829.

2^1255257 is an apocalyptic number.

It is an amenable number.

1255257 is a deficient number, since it is larger than the sum of its proper divisors (620001).

1255257 is an equidigital number, since it uses as much as digits as its factorization.

1255257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15509 (or 15500 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 1255257 is about 1120.3825239622. The cubic root of 1255257 is about 107.8725348057.

The spelling of 1255257 in words is "one million, two hundred fifty-five thousand, two hundred fifty-seven".