1191671 has 8 divisors (see below), whose sum is σ = 1325184. Its totient is φ = 1064160.

The previous prime is 1191667. The next prime is 1191679. The reversal of 1191671 is 1761911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1191671 - 2² = 1191667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1191671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (165648).

2^1191671 is an apocalyptic number.

1191671 is a deficient number, since it is larger than the sum of its proper divisors (133513).

1191671 is a wasteful number, since it uses less digits than its factorization.

1191671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001.

The product of its digits is 378, while the sum is 26.

The square root of 1191671 is about 1091.6368443764. The cubic root of 1191671 is about 106.0194280279.

The spelling of 1191671 in words is "one million, one hundred ninety-one thousand, six hundred seventy-one".