6400051 has 4 divisors (see below), whose sum is σ = 7314352. Its totient is φ = 5485752.

The previous prime is 6400033. The next prime is 6400091. The reversal of 6400051 is 1500046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6400051 - 2⁵ = 6400019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6399998 and 6400034.

It is not an unprimeable number, because it can be changed into a prime (6400091) 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, 457140 + ... + 457153.

It is an arithmetic number, because the mean of its divisors is an integer number (1828588).

Almost surely, 2^6400051 is an apocalyptic number.

6400051 is a deficient number, since it is larger than the sum of its proper divisors (914301).

6400051 is an equidigital number, since it uses as much as digits as its factorization.

6400051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914300.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 6400051 is about 2529.8322078747. The cubic root of 6400051 is about 185.6640465120.

Adding to 6400051 its reverse (1500046), we get a palindrome (7900097).

The spelling of 6400051 in words is "six million, four hundred thousand, fifty-one".