1285656 has 16 divisors (see below), whose sum is σ = 3214200. Its totient is φ = 428544.

The previous prime is 1285649. The next prime is 1285679. The reversal of 1285656 is 6565821.

It is a super-2 number, since 2×1285656² = 3305822700672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26761 + ... + 26808.

2^1285656 is an apocalyptic number.

It is an amenable number.

1285656 is an abundant number, since it is smaller than the sum of its proper divisors (1928544).

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

1285656 is a wasteful number, since it uses less digits than its factorization.

1285656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53578 (or 53574 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 1285656 is about 1133.8677171522. The cubic root of 1285656 is about 108.7363941229.

The spelling of 1285656 in words is "one million, two hundred eighty-five thousand, six hundred fifty-six".