1123256000 has 56 divisors (see below), whose sum is σ = 2781763296. Its totient is φ = 449299200.

The previous prime is 1123255993. The next prime is 1123256033. The reversal of 1123256000 is 6523211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62204 + ... + 78203.

Almost surely, 2^1123256000 is an apocalyptic number.

1123256000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123256000 is an abundant number, since it is smaller than the sum of its proper divisors (1658507296).

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

1123256000 is an equidigital number, since it uses as much as digits as its factorization.

1123256000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140434 (or 140414 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1123256000 is about 33515.0115619852. The cubic root of 1123256000 is about 1039.5042015457.

Adding to 1123256000 its reverse (6523211), we get a palindrome (1129779211).

The spelling of 1123256000 in words is "one billion, one hundred twenty-three million, two hundred fifty-six thousand".