6400851 has 24 divisors (see below), whose sum is σ = 9197760. Its totient is φ = 3956064.

The previous prime is 6400843. The next prime is 6400873. The reversal of 6400851 is 1580046.

It is not a de Polignac number, because 6400851 - 2³ = 6400843 is a prime.

6400851 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108460 + ... + 108518.

It is an arithmetic number, because the mean of its divisors is an integer number (383240).

Almost surely, 2^6400851 is an apocalyptic number.

6400851 is a deficient number, since it is larger than the sum of its proper divisors (2796909).

6400851 is a wasteful number, since it uses less digits than its factorization.

6400851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 6400851 is about 2529.9903161870. The cubic root of 6400851 is about 185.6717821300.

Adding to 6400851 its reverse (1580046), we get a palindrome (7980897).

The spelling of 6400851 in words is "six million, four hundred thousand, eight hundred fifty-one".