1129112409 has 16 divisors (see below), whose sum is σ = 1595909952. Its totient is φ = 707632128.

The previous prime is 1129112377. The next prime is 1129112417. The reversal of 1129112409 is 9042119211.

It is a happy number.

It is not a de Polignac number, because 1129112409 - 2⁵ = 1129112377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1129112459) 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, 32497 + ... + 57569.

It is an arithmetic number, because the mean of its divisors is an integer number (99744372).

Almost surely, 2^1129112409 is an apocalyptic number.

It is an amenable number.

1129112409 is a deficient number, since it is larger than the sum of its proper divisors (466797543).

1129112409 is a wasteful number, since it uses less digits than its factorization.

1129112409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25976.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1129112409 is about 33602.2679145322. The cubic root of 1129112409 is about 1041.3076527681.

The spelling of 1129112409 in words is "one billion, one hundred twenty-nine million, one hundred twelve thousand, four hundred nine".