1129989 has 12 divisors (see below), whose sum is σ = 1752864. Its totient is φ = 645624.

The previous prime is 1129963. The next prime is 1129991. The reversal of 1129989 is 9899211.

1129989 = 242² + 243² + ... + 259².

It is a happy number.

It is not a de Polignac number, because 1129989 - 2⁵ = 1129957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3697 + ... + 3990.

It is an arithmetic number, because the mean of its divisors is an integer number (146072).

2^1129989 is an apocalyptic number.

It is an amenable number.

1129989 is a deficient number, since it is larger than the sum of its proper divisors (622875).

1129989 is an equidigital number, since it uses as much as digits as its factorization.

1129989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704 (or 7697 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The square root of 1129989 is about 1063.0094072961. The cubic root of 1129989 is about 104.1577057536.

It can be divided in two parts, 112 and 9989, that added together give a palindrome (10101).

The spelling of 1129989 in words is "one million, one hundred twenty-nine thousand, nine hundred eighty-nine".