1165320 has 128 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 283392.

The previous prime is 1165303. The next prime is 1165349. The reversal of 1165320 is 235611.

1165320 is a `hidden beast` number, since 11 + 653 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1165293 and 1165302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13999 + ... + 14081.

It is an arithmetic number, because the mean of its divisors is an integer number (33075).

2^1165320 is an apocalyptic number.

1165320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 1079×1080.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116800).

1165320 is an abundant number, since it is smaller than the sum of its proper divisors (3068280).

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

1165320 is a wasteful number, since it uses less digits than its factorization.

1165320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1165320 is about 1079.4998842056. The cubic root of 1165320 is about 105.2321394570.

It can be divided in two parts, 1165 and 320, that added together give a triangular number (1485 = T₅₄).

The spelling of 1165320 in words is "one million, one hundred sixty-five thousand, three hundred twenty".