1261256 has 16 divisors (see below), whose sum is σ = 2429340. Its totient is φ = 613440.

The previous prime is 1261223. The next prime is 1261259. The reversal of 1261256 is 6521621.

It can be written as a sum of positive squares in 2 ways, for example, as 940900 + 320356 = 970^2 + 566^2 .

It is not an unprimeable number, because it can be changed into a prime (1261259) 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, 1835 + ... + 2426.

2^1261256 is an apocalyptic number.

It is an amenable number.

1261256 is a deficient number, since it is larger than the sum of its proper divisors (1168084).

1261256 is a wasteful number, since it uses less digits than its factorization.

1261256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304 (or 4300 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1261256 is about 1123.0565435453. The cubic root of 1261256 is about 108.0441063561.

Adding to 1261256 its reverse (6521621), we get a palindrome (7782877).

The spelling of 1261256 in words is "one million, two hundred sixty-one thousand, two hundred fifty-six".