4191191 has 4 divisors (see below), whose sum is σ = 4411800. Its totient is φ = 3970584.

The previous prime is 4191181. The next prime is 4191193. The reversal of 4191191 is 1911914.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1911914 = 2 ⋅955957.

It is a cyclic number.

It is not a de Polignac number, because 4191191 - 2¹⁰ = 4190167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4191191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4191193) 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, 110276 + ... + 110313.

It is an arithmetic number, because the mean of its divisors is an integer number (1102950).

Almost surely, 2^4191191 is an apocalyptic number.

4191191 is a deficient number, since it is larger than the sum of its proper divisors (220609).

4191191 is a wasteful number, since it uses less digits than its factorization.

4191191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220608.

The product of its digits is 324, while the sum is 26.

The square root of 4191191 is about 2047.2398491628. The cubic root of 4191191 is about 161.2299864992.

The spelling of 4191191 in words is "four million, one hundred ninety-one thousand, one hundred ninety-one".