1128401 has 4 divisors (see below), whose sum is σ = 1140132. Its totient is φ = 1116672.

The previous prime is 1128397. The next prime is 1128427. The reversal of 1128401 is 1048211.

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 638401 + 490000 = 799^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128401 - 2² = 1128397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128401.

It is not an unprimeable number, because it can be changed into a prime (1128451) 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, 5720 + ... + 5913.

It is an arithmetic number, because the mean of its divisors is an integer number (285033).

2^1128401 is an apocalyptic number.

It is an amenable number.

1128401 is a deficient number, since it is larger than the sum of its proper divisors (11731).

1128401 is an equidigital number, since it uses as much as digits as its factorization.

1128401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11730.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1128401 is about 1062.2622086848. The cubic root of 1128401 is about 104.1088911254.

The spelling of 1128401 in words is "one million, one hundred twenty-eight thousand, four hundred one".