3861191 has 4 divisors (see below), whose sum is σ = 3943392. Its totient is φ = 3778992.

The previous prime is 3861173. The next prime is 3861203. The reversal of 3861191 is 1911683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1911683 = 131 ⋅14593.

It is a cyclic number.

It is not a de Polignac number, because 3861191 - 2¹⁴ = 3844807 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 (3864191) 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, 41030 + ... + 41123.

It is an arithmetic number, because the mean of its divisors is an integer number (985848).

Almost surely, 2^3861191 is an apocalyptic number.

3861191 is a deficient number, since it is larger than the sum of its proper divisors (82201).

3861191 is an equidigital number, since it uses as much as digits as its factorization.

3861191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82200.

The product of its digits is 1296, while the sum is 29.

The square root of 3861191 is about 1964.9913485815. The cubic root of 3861191 is about 156.8822328057.

The spelling of 3861191 in words is "three million, eight hundred sixty-one thousand, one hundred ninety-one".