1171889 has 4 divisors (see below), whose sum is σ = 1175040. Its totient is φ = 1168740.

The previous prime is 1171867. The next prime is 1171921. The reversal of 1171889 is 9881711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1171889 - 2⁸ = 1171633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1171189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (293760).

2^1171889 is an apocalyptic number.

It is an amenable number.

1171889 is a deficient number, since it is larger than the sum of its proper divisors (3151).

1171889 is an equidigital number, since it uses as much as digits as its factorization.

1171889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150.

The product of its digits is 4032, while the sum is 35.

The square root of 1171889 is about 1082.5382210343. The cubic root of 1171889 is about 105.4295030031.

The spelling of 1171889 in words is "one million, one hundred seventy-one thousand, eight hundred eighty-nine".