8128961 has 8 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 7714000.

The previous prime is 8128957. The next prime is 8128969. The reversal of 8128961 is 1698218.

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

It is not a de Polignac number, because 8128961 - 2² = 8128957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8128969) 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, 665 + ... + 4086.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^8128961 is an apocalyptic number.

It is an amenable number.

8128961 is a deficient number, since it is larger than the sum of its proper divisors (424639).

8128961 is a wasteful number, since it uses less digits than its factorization.

8128961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839.

The product of its digits is 6912, while the sum is 35.

The square root of 8128961 is about 2851.1332834506. The cubic root of 8128961 is about 201.0689515344.

The spelling of 8128961 in words is "eight million, one hundred twenty-eight thousand, nine hundred sixty-one".