1286436 has 48 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 398112.

The previous prime is 1286419. The next prime is 1286447. The reversal of 1286436 is 6346821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16245 + ... + 16323.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2^1286436 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 1286436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1612800).

1286436 is an abundant number, since it is smaller than the sum of its proper divisors (1939164).

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

1286436 is a wasteful number, since it uses less digits than its factorization.

1286436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 166 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 1286436 is about 1134.2116204660. The cubic root of 1286436 is about 108.7583795895.

The spelling of 1286436 in words is "one million, two hundred eighty-six thousand, four hundred thirty-six".