6128681 has 8 divisors (see below), whose sum is σ = 6626760. Its totient is φ = 5634432.

The previous prime is 6128663. The next prime is 6128693. The reversal of 6128681 is 1868216.

It can be written as a sum of positive squares in 4 ways, for example, as 3097600 + 3031081 = 1760^2 + 1741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6128681 - 2¹⁸ = 5866537 is a prime.

It is a super-2 number, since 2×6128681² = 75121461599522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6128611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (828345).

Almost surely, 2^6128681 is an apocalyptic number.

It is an amenable number.

6128681 is a deficient number, since it is larger than the sum of its proper divisors (498079).

6128681 is a wasteful number, since it uses less digits than its factorization.

6128681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its digits is 4608, while the sum is 32.

The square root of 6128681 is about 2475.6172967565. The cubic root of 6128681 is about 183.0019309619.

The spelling of 6128681 in words is "six million, one hundred twenty-eight thousand, six hundred eighty-one".