1121870500 has 24 divisors (see below), whose sum is σ = 2450166264. Its totient is φ = 448748000.

The previous prime is 1121870479. The next prime is 1121870509. The reversal of 1121870500 is 50781211.

It can be written as a sum of positive squares in 4 ways, for example, as 268763236 + 853107264 = 16394^2 + 29208^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1121870509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121371 + ... + 1122370.

It is an arithmetic number, because the mean of its divisors is an integer number (102090261).

Almost surely, 2^1121870500 is an apocalyptic number.

1121870500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121870500 is an abundant number, since it is smaller than the sum of its proper divisors (1328295764).

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

1121870500 is a wasteful number, since it uses less digits than its factorization.

1121870500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243760 (or 2243748 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 1121870500 is about 33494.3353419649. The cubic root of 1121870500 is about 1039.0766274108.

It can be divided in two parts, 11218 and 70500, that added together give a palindrome (81718).

The spelling of 1121870500 in words is "one billion, one hundred twenty-one million, eight hundred seventy thousand, five hundred".