1285286256 has 30 divisors (see below), whose sum is σ = 3597016800. Its totient is φ = 428428704.

The previous prime is 1285286251. The next prime is 1285286263. The reversal of 1285286256 is 6526825821.

It is a happy number.

1285286256 is a `hidden beast` number, since 12 + 8 + 5 + 2 + 8 + 625 + 6 = 666.

1285286256 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285286251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4462656 + ... + 4462943.

It is an arithmetic number, because the mean of its divisors is an integer number (119900560).

Almost surely, 2^1285286256 is an apocalyptic number.

1285286256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1285286256 is an abundant number, since it is smaller than the sum of its proper divisors (2311730544).

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

1285286256 is a wasteful number, since it uses less digits than its factorization.

1285286256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8925613 (or 8925604 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 1285286256 is about 35850.8891939935. The cubic root of 1285286256 is about 1087.2596922850.

The spelling of 1285286256 in words is "one billion, two hundred eighty-five million, two hundred eighty-six thousand, two hundred fifty-six".