6504381 has 48 divisors (see below), whose sum is σ = 11007360. Its totient is φ = 3810240.

The previous prime is 6504367. The next prime is 6504397. The reversal of 6504381 is 1834056.

6504381 is a `hidden beast` number, since 650 + 4 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 6504381 - 2⁹ = 6503869 is a prime.

It is a super-2 number, since 2×6504381² = 84613944386322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91576 + ... + 91646.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^6504381 is an apocalyptic number.

It is an amenable number.

6504381 is a deficient number, since it is larger than the sum of its proper divisors (4502979).

6504381 is a wasteful number, since it uses less digits than its factorization.

6504381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 6504381 is about 2550.3687968606. The cubic root of 6504381 is about 186.6674769664.

The spelling of 6504381 in words is "six million, five hundred four thousand, three hundred eighty-one".