1286320 has 40 divisors (see below), whose sum is σ = 3419424. Its totient is φ = 440832.

The previous prime is 1286303. The next prime is 1286323. The reversal of 1286320 is 236821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1286291 and 1286300.

It is not an unprimeable number, because it can be changed into a prime (1286323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589 + ... + 1708.

2^1286320 is an apocalyptic number.

1286320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1286320 is an abundant number, since it is smaller than the sum of its proper divisors (2133104).

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

1286320 is a wasteful number, since it uses less digits than its factorization.

1286320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317 (or 2311 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1286320 is about 1134.1604824715. The cubic root of 1286320 is about 108.7551105186.

The spelling of 1286320 in words is "one million, two hundred eighty-six thousand, three hundred twenty".