1128241 has 4 divisors (see below), whose sum is σ = 1158772. Its totient is φ = 1097712.

The previous prime is 1128233. The next prime is 1128247. The reversal of 1128241 is 1428211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1428211 = 19 ⋅75169.

It can be written as a sum of positive squares in 2 ways, for example, as 519841 + 608400 = 721^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128241 - 2³ = 1128233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15210 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (289693).

2^1128241 is an apocalyptic number.

It is an amenable number.

1128241 is a deficient number, since it is larger than the sum of its proper divisors (30531).

1128241 is an equidigital number, since it uses as much as digits as its factorization.

1128241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30530.

The product of its digits is 128, while the sum is 19.

The square root of 1128241 is about 1062.1868950425. The cubic root of 1128241 is about 104.1039702359.

It can be divided in two parts, 1128 and 241, that added together give a square (1369 = 37²).

The spelling of 1128241 in words is "one million, one hundred twenty-eight thousand, two hundred forty-one".