1128538 has 4 divisors (see below), whose sum is σ = 1692810. Its totient is φ = 564268.

The previous prime is 1128527. The next prime is 1128539. The reversal of 1128538 is 8358211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8358211 = 43 ⋅194377.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 94249 = 1017^2 + 307^2 .

It is not an unprimeable number, because it can be changed into a prime (1128539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282133 + ... + 282136.

2^1128538 is an apocalyptic number.

1128538 is a deficient number, since it is larger than the sum of its proper divisors (564272).

1128538 is an equidigital number, since it uses as much as digits as its factorization.

1128538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564271.

The product of its digits is 1920, while the sum is 28.

The square root of 1128538 is about 1062.3266917479. The cubic root of 1128538 is about 104.1131042674.

The spelling of 1128538 in words is "one million, one hundred twenty-eight thousand, five hundred thirty-eight".