6400171 has 4 divisors (see below), whose sum is σ = 6405232. Its totient is φ = 6395112.

The previous prime is 6400159. The next prime is 6400183. The reversal of 6400171 is 1710046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (6400159) and next prime (6400183).

It is a cyclic number.

It is not a de Polignac number, because 6400171 - 2⁵ = 6400139 is a prime.

It is a Duffinian number.

6400171 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (6400151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225 + ... + 3781.

It is an arithmetic number, because the mean of its divisors is an integer number (1601308).

Almost surely, 2^6400171 is an apocalyptic number.

6400171 is a deficient number, since it is larger than the sum of its proper divisors (5061).

6400171 is a wasteful number, since it uses less digits than its factorization.

6400171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 6400171 is about 2529.8559247514. The cubic root of 6400171 is about 185.6652068958.

The spelling of 6400171 in words is "six million, four hundred thousand, one hundred seventy-one".