1321189 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 1140480.

The previous prime is 1321171. The next prime is 1321193. The reversal of 1321189 is 9811231.

It is a cyclic number.

It is not a de Polignac number, because 1321189 - 2⁵ = 1321157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12067 + ... + 12175.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1321189 is an apocalyptic number.

It is an amenable number.

1321189 is a deficient number, since it is larger than the sum of its proper divisors (199451).

1321189 is a wasteful number, since it uses less digits than its factorization.

1321189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

The product of its digits is 432, while the sum is 25.

The square root of 1321189 is about 1149.4298586691. The cubic root of 1321189 is about 109.7290577047.

The spelling of 1321189 in words is "one million, three hundred twenty-one thousand, one hundred eighty-nine".