1251256 has 16 divisors (see below), whose sum is σ = 2359800. Its totient is φ = 621984.

The previous prime is 1251247. The next prime is 1251259. The reversal of 1251256 is 6521521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251259) 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 3 ways as a sum of consecutive naturals, for example, 1491 + ... + 2173.

2^1251256 is an apocalyptic number.

It is an amenable number.

1251256 is a deficient number, since it is larger than the sum of its proper divisors (1108544).

1251256 is a wasteful number, since it uses less digits than its factorization.

1251256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 914 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 1251256 is about 1118.5955479976. The cubic root of 1251256 is about 107.7578020237.

Adding to 1251256 its reverse (6521521), we get a palindrome (7772777).

The spelling of 1251256 in words is "one million, two hundred fifty-one thousand, two hundred fifty-six".