11172191 has 8 divisors (see below), whose sum is σ = 11355984. Its totient is φ = 10990080.

The previous prime is 11172157. The next prime is 11172193. The reversal of 11172191 is 19127111.

It is a happy number.

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 11172191 - 2⁶ = 11172127 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 (11172193) 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, 20381 + ... + 20921.

It is an arithmetic number, because the mean of its divisors is an integer number (1419498).

Almost surely, 2^11172191 is an apocalyptic number.

11172191 is a deficient number, since it is larger than the sum of its proper divisors (183793).

11172191 is a wasteful number, since it uses less digits than its factorization.

11172191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its digits is 126, while the sum is 23.

The square root of 11172191 is about 3342.4827598658. The cubic root of 11172191 is about 223.5524586293.

The spelling of 11172191 in words is "eleven million, one hundred seventy-two thousand, one hundred ninety-one".