1255686287 has 4 divisors (see below), whose sum is σ = 1267877520. Its totient is φ = 1243495056.

The previous prime is 1255686259. The next prime is 1255686293. The reversal of 1255686287 is 7826865521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255686287 - 2¹⁴ = 1255669903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255689287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6095462 + ... + 6095667.

It is an arithmetic number, because the mean of its divisors is an integer number (316969380).

Almost surely, 2^1255686287 is an apocalyptic number.

1255686287 is a deficient number, since it is larger than the sum of its proper divisors (12191233).

1255686287 is a wasteful number, since it uses less digits than its factorization.

1255686287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12191232.

The product of its digits is 1612800, while the sum is 50.

The square root of 1255686287 is about 35435.6640547345. The cubic root of 1255686287 is about 1078.8483056103.

The spelling of 1255686287 in words is "one billion, two hundred fifty-five million, six hundred eighty-six thousand, two hundred eighty-seven".