1320786 has 40 divisors (see below), whose sum is σ = 3066624. Its totient is φ = 424440.

The previous prime is 1320773. The next prime is 1320791. The reversal of 1320786 is 6870231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4891 + ... + 5153.

2^1320786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533312).

1320786 is an abundant number, since it is smaller than the sum of its proper divisors (1745838).

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

1320786 is a wasteful number, since it uses less digits than its factorization.

1320786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1320786 is about 1149.2545409960. The cubic root of 1320786 is about 109.7178997484.

It can be divided in two parts, 1320 and 786, that multiplied together give a triangular number (1037520 = T₁₄₄₀).

The spelling of 1320786 in words is "one million, three hundred twenty thousand, seven hundred eighty-six".