1165560 has 64 divisors (see below), whose sum is σ = 3818880. Its totient is φ = 282240.

The previous prime is 1165531. The next prime is 1165579. The reversal of 1165560 is 655611.

It is a super-2 number, since 2×1165560² = 2717060227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165560.

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, 879 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (59670).

2^1165560 is an apocalyptic number.

1165560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909440).

1165560 is an abundant number, since it is smaller than the sum of its proper divisors (2653320).

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

1165560 is a wasteful number, since it uses less digits than its factorization.

1165560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1165560 is about 1079.6110410699. The cubic root of 1165560 is about 105.2393632181.

It can be divided in two parts, 1 and 165560, that added together give a palindrome (165561).

The spelling of 1165560 in words is "one million, one hundred sixty-five thousand, five hundred sixty".