1180891 has 2 divisors, whose sum is σ = 1180892. Its totient is φ = 1180890.

The previous prime is 1180877. The next prime is 1180897. The reversal of 1180891 is 1980811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1180891 - 2⁵ = 1180859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1180897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590445 + 590446.

It is an arithmetic number, because the mean of its divisors is an integer number (590446).

2^1180891 is an apocalyptic number.

1180891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1180891 is an equidigital number, since it uses as much as digits as its factorization.

1180891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1180891 is about 1086.6880877234. The cubic root of 1180891 is about 105.6987709848.

The spelling of 1180891 in words is "one million, one hundred eighty thousand, eight hundred ninety-one".