6381601 has 4 divisors (see below), whose sum is σ = 6387604. Its totient is φ = 6375600.

The previous prime is 6381589. The next prime is 6381607. The reversal of 6381601 is 1061836.

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 2637376 + 3744225 = 1624^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 6381601 - 2⁵ = 6381569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6381607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930 + ... + 3691.

It is an arithmetic number, because the mean of its divisors is an integer number (1596901).

Almost surely, 2^6381601 is an apocalyptic number.

It is an amenable number.

6381601 is a deficient number, since it is larger than the sum of its proper divisors (6003).

6381601 is a wasteful number, since it uses less digits than its factorization.

6381601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 6381601 is about 2526.1830891683. The cubic root of 6381601 is about 185.4854646743.

The spelling of 6381601 in words is "six million, three hundred eighty-one thousand, six hundred one".