1185660 has 72 divisors (see below), whose sum is σ = 4114656. Its totient is φ = 270720.

The previous prime is 1185659. The next prime is 1185661. The reversal of 1185660 is 665811.

It is an interprime number because it is at equal distance from previous prime (1185659) and next prime (1185661).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 790 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (57148).

2^1185660 is an apocalyptic number.

1185660 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 1185660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057328).

1185660 is an abundant number, since it is smaller than the sum of its proper divisors (2928996).

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

1185660 is a wasteful number, since it uses less digits than its factorization.

1185660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1185660 is about 1088.8801586952. The cubic root of 1185660 is about 105.8408671899.

It can be divided in two parts, 118 and 5660, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 1185660 in words is "one million, one hundred eighty-five thousand, six hundred sixty".