6391801 has 4 divisors (see below), whose sum is σ = 6883492. Its totient is φ = 5900112.

The previous prime is 6391799. The next prime is 6391817. The reversal of 6391801 is 1081936.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2295225 + 4096576 = 1515^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 6391801 - 2¹ = 6391799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6391801.

It is not an unprimeable number, because it can be changed into a prime (6391841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245826 + ... + 245851.

It is an arithmetic number, because the mean of its divisors is an integer number (1720873).

Almost surely, 2^6391801 is an apocalyptic number.

It is an amenable number.

6391801 is a deficient number, since it is larger than the sum of its proper divisors (491691).

6391801 is a wasteful number, since it uses less digits than its factorization.

6391801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491690.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 6391801 is about 2528.2011391501. The cubic root of 6391801 is about 185.5842353243.

The spelling of 6391801 in words is "six million, three hundred ninety-one thousand, eight hundred one".