6406191 has 12 divisors (see below), whose sum is σ = 10094760. Its totient is φ = 3882480.

The previous prime is 6406177. The next prime is 6406193. The reversal of 6406191 is 1916046.

6406191 is a `hidden beast` number, since 6 + 40 + 619 + 1 = 666.

It is not a de Polignac number, because 6406191 - 2¹³ = 6397999 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32256 + ... + 32453.

It is an arithmetic number, because the mean of its divisors is an integer number (841230).

Almost surely, 2^6406191 is an apocalyptic number.

6406191 is a deficient number, since it is larger than the sum of its proper divisors (3688569).

6406191 is a wasteful number, since it uses less digits than its factorization.

6406191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64726 (or 64723 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 6406191 is about 2531.0454361785. The cubic root of 6406191 is about 185.7234008769.

The spelling of 6406191 in words is "six million, four hundred six thousand, one hundred ninety-one".