6417891 has 12 divisors (see below), whose sum is σ = 9815832. Its totient is φ = 4026816.

The previous prime is 6417889. The next prime is 6417911. The reversal of 6417891 is 1987146.

6417891 is a `hidden beast` number, since 641 + 7 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 6417891 - 2¹ = 6417889 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6417841) 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, 20821 + ... + 21126.

It is an arithmetic number, because the mean of its divisors is an integer number (817986).

Almost surely, 2^6417891 is an apocalyptic number.

6417891 is a deficient number, since it is larger than the sum of its proper divisors (3397941).

6417891 is a wasteful number, since it uses less digits than its factorization.

6417891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41970 (or 41967 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 6417891 is about 2533.3556797260. The cubic root of 6417891 is about 185.8363979377.

It can be divided in two parts, 64 and 17891, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 6417891 in words is "six million, four hundred seventeen thousand, eight hundred ninety-one".