1129009 has 6 divisors (see below), whose sum is σ = 1313394. Its totient is φ = 967680.

The previous prime is 1128997. The next prime is 1129013. The reversal of 1129009 is 9009211.

It can be written as a sum of positive squares in only one way, i.e., 815409 + 313600 = 903^2 + 560^2 .

It is not a de Polignac number, because 1129009 - 2⁵ = 1128977 is a prime.

It is a super-2 number, since 2×1129009² = 2549322644162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11472 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (218899).

2^1129009 is an apocalyptic number.

It is an amenable number.

1129009 is a deficient number, since it is larger than the sum of its proper divisors (184385).

1129009 is an equidigital number, since it uses as much as digits as its factorization.

1129009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23055 (or 23048 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1129009 is about 1062.5483518410. The cubic root of 1129009 is about 104.1275862644.

The spelling of 1129009 in words is "one million, one hundred twenty-nine thousand, nine".