1123502000 has 80 divisors (see below), whose sum is σ = 2804415744. Its totient is φ = 434880000.

The previous prime is 1123501987. The next prime is 1123502011. The reversal of 1123502000 is 2053211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52940 + ... + 71060.

Almost surely, 2^1123502000 is an apocalyptic number.

1123502000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123502000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402207872).

1123502000 is an abundant number, since it is smaller than the sum of its proper divisors (1680913744).

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

1123502000 is a wasteful number, since it uses less digits than its factorization.

1123502000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175 (or 18159 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1123502000 is about 33518.6813583112. The cubic root of 1123502000 is about 1039.5800819529.

Adding to 1123502000 its reverse (2053211), we get a palindrome (1125555211).

The spelling of 1123502000 in words is "one billion, one hundred twenty-three million, five hundred two thousand".