1128481 has 4 divisors (see below), whose sum is σ = 1145392. Its totient is φ = 1111572.

The previous prime is 1128451. The next prime is 1128497. The reversal of 1128481 is 1848211.

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 1128481 - 2⁹ = 1127969 is a prime.

It is a super-2 number, since 2×1128481² = 2546938734722, which contains 22 as substring.

It is a Duffinian number.

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8355 + ... + 8488.

It is an arithmetic number, because the mean of its divisors is an integer number (286348).

2^1128481 is an apocalyptic number.

It is an amenable number.

1128481 is a deficient number, since it is larger than the sum of its proper divisors (16911).

1128481 is an equidigital number, since it uses as much as digits as its factorization.

1128481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16910.

The product of its digits is 512, while the sum is 25.

The square root of 1128481 is about 1062.2998635037. The cubic root of 1128481 is about 104.1113513958. Note that the first 3 decimals are identical.

The spelling of 1128481 in words is "one million, one hundred twenty-eight thousand, four hundred eighty-one".