1286256 has 40 divisors (see below), whose sum is σ = 3364864. Its totient is φ = 423360.

The previous prime is 1286239. The next prime is 1286261. The reversal of 1286256 is 6526821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5991 + ... + 6201.

2^1286256 is an apocalyptic number.

1286256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1286256 is an abundant number, since it is smaller than the sum of its proper divisors (2078608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1286256 is a wasteful number, since it uses less digits than its factorization.

1286256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 343 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 1286256 is about 1134.1322674186. The cubic root of 1286256 is about 108.7533068092.

It can be divided in two parts, 12 and 86256, that added together give a palindrome (86268).

The spelling of 1286256 in words is "one million, two hundred eighty-six thousand, two hundred fifty-six".