1255636 has 6 divisors (see below), whose sum is σ = 2197370. Its totient is φ = 627816.

The previous prime is 1255633. The next prime is 1255651. The reversal of 1255636 is 6365521.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 32400 = 1106^2 + 180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156951 + ... + 156958.

2^1255636 is an apocalyptic number.

It is an amenable number.

1255636 is a deficient number, since it is larger than the sum of its proper divisors (941734).

1255636 is a wasteful number, since it uses less digits than its factorization.

1255636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313913 (or 313911 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 1255636 is about 1120.5516498582. The cubic root of 1255636 is about 107.8833903720.

It can be divided in two parts, 125563 and 6, that multiplied together give a triangular number (753378 = T₁₂₂₇).

The spelling of 1255636 in words is "one million, two hundred fifty-five thousand, six hundred thirty-six".