1255687 has 2 divisors, whose sum is σ = 1255688. Its totient is φ = 1255686.

The previous prime is 1255679. The next prime is 1255693. The reversal of 1255687 is 7865521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255687 - 2³ = 1255679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627843 + 627844.

It is an arithmetic number, because the mean of its divisors is an integer number (627844).

2^1255687 is an apocalyptic number.

1255687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255687 is an equidigital number, since it uses as much as digits as its factorization.

1255687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 1255687 is about 1120.5744062756. The cubic root of 1255687 is about 107.8848509806.

The spelling of 1255687 in words is "one million, two hundred fifty-five thousand, six hundred eighty-seven".