11142191 has 8 divisors (see below), whose sum is σ = 11872944. Its totient is φ = 10419840.

The previous prime is 11142181. The next prime is 11142211. The reversal of 11142191 is 19124111.

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 11142191 - 2¹⁰ = 11141167 is a prime.

It is a super-3 number, since 3×11142191³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142181) 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, 761 + ... + 4781.

It is an arithmetic number, because the mean of its divisors is an integer number (1484118).

Almost surely, 2^11142191 is an apocalyptic number.

11142191 is a deficient number, since it is larger than the sum of its proper divisors (730753).

11142191 is a wasteful number, since it uses less digits than its factorization.

11142191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201.

The product of its digits is 72, while the sum is 20.

The square root of 11142191 is about 3337.9920611050. The cubic root of 11142191 is about 223.3521820185.

The spelling of 11142191 in words is "eleven million, one hundred forty-two thousand, one hundred ninety-one".