1243113000 has 256 divisors, whose sum is σ = 4140115200. Its totient is φ = 309657600.

The previous prime is 1243112971. The next prime is 1243113023. The reversal of 1243113000 is 3113421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6440904 + ... + 6441096.

It is an arithmetic number, because the mean of its divisors is an integer number (16172325).

Almost surely, 2^1243113000 is an apocalyptic number.

1243113000 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 1243113000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2070057600).

1243113000 is an abundant number, since it is smaller than the sum of its proper divisors (2897002200).

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

1243113000 is a wasteful number, since it uses less digits than its factorization.

1243113000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1243113000 is about 35257.8076459669. The cubic root of 1243113000 is about 1075.2353549949.

Adding to 1243113000 its reverse (3113421), we get a palindrome (1246226421).

The spelling of 1243113000 in words is "one billion, two hundred forty-three million, one hundred thirteen thousand".