8128401 has 4 divisors (see below), whose sum is σ = 10837872. Its totient is φ = 5418932.

The previous prime is 8128369. The next prime is 8128403. The reversal of 8128401 is 1048218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8128401 - 2⁵ = 8128369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8128403) 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, 1354731 + ... + 1354736.

It is an arithmetic number, because the mean of its divisors is an integer number (2709468).

Almost surely, 2^8128401 is an apocalyptic number.

It is an amenable number.

8128401 is a deficient number, since it is larger than the sum of its proper divisors (2709471).

8128401 is a wasteful number, since it uses less digits than its factorization.

8128401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709470.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 8128401 is about 2851.0350751964. The cubic root of 8128401 is about 201.0643342490.

It can be divided in two parts, 81 and 28401, that added together give a palindrome (28482).

The spelling of 8128401 in words is "eight million, one hundred twenty-eight thousand, four hundred one".