1285312 has 56 divisors (see below), whose sum is σ = 3088640. Its totient is φ = 518400.

The previous prime is 1285301. The next prime is 1285351. The reversal of 1285312 is 2135821.

It is a tau number, because it is divible by the number of its divisors (56).

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, 8437 + ... + 8587.

2^1285312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544320).

1285312 is an abundant number, since it is smaller than the sum of its proper divisors (1803328).

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

1285312 is a wasteful number, since it uses less digits than its factorization.

1285312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 179 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1285312 is about 1133.7160138236. The cubic root of 1285312 is about 108.7266951427.

The spelling of 1285312 in words is "one million, two hundred eighty-five thousand, three hundred twelve".