6397481 has 4 divisors (see below), whose sum is σ = 6425172. Its totient is φ = 6369792.

The previous prime is 6397463. The next prime is 6397493. The reversal of 6397481 is 1847936.

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 714025 + 5683456 = 845^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397481 - 2²² = 2203177 is a prime.

It is a super-2 number, since 2×6397481² = 81855526290722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397421) 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, 13496 + ... + 13961.

It is an arithmetic number, because the mean of its divisors is an integer number (1606293).

Almost surely, 2^6397481 is an apocalyptic number.

It is an amenable number.

6397481 is a deficient number, since it is larger than the sum of its proper divisors (27691).

6397481 is a wasteful number, since it uses less digits than its factorization.

6397481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27690.

The product of its digits is 36288, while the sum is 38.

The square root of 6397481 is about 2529.3242180472. The cubic root of 6397481 is about 185.6391914766.

The spelling of 6397481 in words is "six million, three hundred ninety-seven thousand, four hundred eighty-one".