1128239 has 16 divisors (see below), whose sum is σ = 1440000. Its totient is φ = 860544.

The previous prime is 1128233. The next prime is 1128247. The reversal of 1128239 is 9328211.

It is a cyclic number.

It is not a de Polignac number, because 1128239 - 2⁴ = 1128223 is a prime.

It is a super-2 number, since 2×1128239² = 2545846482242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2012 + ... + 2510.

It is an arithmetic number, because the mean of its divisors is an integer number (90000).

2^1128239 is an apocalyptic number.

1128239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1128239 is a deficient number, since it is larger than the sum of its proper divisors (311761).

1128239 is a wasteful number, since it uses less digits than its factorization.

1128239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 864, while the sum is 26.

The square root of 1128239 is about 1062.1859535882. The cubic root of 1128239 is about 104.1039087219.

The spelling of 1128239 in words is "one million, one hundred twenty-eight thousand, two hundred thirty-nine".