1165580 has 24 divisors (see below), whose sum is σ = 2636592. Its totient is φ = 430272.

The previous prime is 1165579. The next prime is 1165583. The reversal of 1165580 is 855611.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1165583) 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, 1982 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (109858).

2^1165580 is an apocalyptic number.

1165580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165580 is an abundant number, since it is smaller than the sum of its proper divisors (1471012).

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

1165580 is a wasteful number, since it uses less digits than its factorization.

1165580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1165580 is about 1079.6203036253. The cubic root of 1165580 is about 105.2399651535.

The spelling of 1165580 in words is "one million, one hundred sixty-five thousand, five hundred eighty".