1191080 has 32 divisors (see below), whose sum is σ = 2924640. Its totient is φ = 432960.

The previous prime is 1191079. The next prime is 1191089. The reversal of 1191080 is 801911.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1191089) 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, 914 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (91395).

2^1191080 is an apocalyptic number.

1191080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191080 is an abundant number, since it is smaller than the sum of its proper divisors (1733560).

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

1191080 is a wasteful number, since it uses less digits than its factorization.

1191080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1191080 is about 1091.3661163881. The cubic root of 1191080 is about 106.0018986251.

Adding to 1191080 its reverse (801911), we get a palindrome (1992991).

The spelling of 1191080 in words is "one million, one hundred ninety-one thousand, eighty".