1129120256 has 40 divisors (see below), whose sum is σ = 2461141584. Its totient is φ = 513233920.

The previous prime is 1129120243. The next prime is 1129120271. The reversal of 1129120256 is 6520219211.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94610 + ... + 105873.

Almost surely, 2^1129120256 is an apocalyptic number.

1129120256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1129120256 is an abundant number, since it is smaller than the sum of its proper divisors (1332021328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1129120256 is an equidigital number, since it uses as much as digits as its factorization.

1129120256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200512 (or 200496 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1129120256 is about 33602.3846772815. The cubic root of 1129120256 is about 1041.3100650234.

Adding to 1129120256 its reverse (6520219211), we get a palindrome (7649339467).

The spelling of 1129120256 in words is "one billion, one hundred twenty-nine million, one hundred twenty thousand, two hundred fifty-six".