6321001 has 4 divisors (see below), whose sum is σ = 6326100. Its totient is φ = 6315904.

The previous prime is 6320999. The next prime is 6321013. The reversal of 6321001 is 1001236.

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 can be written as a sum of positive squares in 2 ways, for example, as 561001 + 5760000 = 749^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6321001 - 2¹ = 6320999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6321041) 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, 645 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (1581525).

Almost surely, 2^6321001 is an apocalyptic number.

It is an amenable number.

6321001 is a deficient number, since it is larger than the sum of its proper divisors (5099).

6321001 is a wasteful number, since it uses less digits than its factorization.

6321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 6321001 is about 2514.1600983231. The cubic root of 6321001 is about 184.8964699524.

Adding to 6321001 its reverse (1001236), we get a palindrome (7322237).

The spelling of 6321001 in words is "six million, three hundred twenty-one thousand, one".