1121615000 has 80 divisors (see below), whose sum is σ = 2866988520. Its totient is φ = 407840000.

The previous prime is 1121614993. The next prime is 1121615009. The reversal of 1121615000 is 5161211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121615000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121615009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44804 + ... + 65196.

Almost surely, 2^1121615000 is an apocalyptic number.

1121615000 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 1121615000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1433494260).

1121615000 is an abundant number, since it is smaller than the sum of its proper divisors (1745373520).

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

1121615000 is a wasteful number, since it uses less digits than its factorization.

1121615000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20430 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1121615000 is about 33490.5210470067. The cubic root of 1121615000 is about 1038.9977400421.

Adding to 1121615000 its reverse (5161211), we get a palindrome (1126776211).

The spelling of 1121615000 in words is "one billion, one hundred twenty-one million, six hundred fifteen thousand".