1121525200 has 30 divisors (see below), whose sum is σ = 2694465254. Its totient is φ = 448609920.

The previous prime is 1121525147. The next prime is 1121525201. The reversal of 1121525200 is 25251211.

It can be written as a sum of positive squares in 3 ways, for example, as 222964624 + 898560576 = 14932^2 + 29976^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121525201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1401507 + ... + 1402306.

Almost surely, 2^1121525200 is an apocalyptic number.

1121525200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121525200 is an abundant number, since it is smaller than the sum of its proper divisors (1572940054).

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

1121525200 is a wasteful number, since it uses less digits than its factorization.

1121525200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803831 (or 2803820 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1121525200 is about 33489.1803423135. The cubic root of 1121525200 is about 1038.9700108340.

Adding to 1121525200 its reverse (25251211), we get a palindrome (1146776411).

The spelling of 1121525200 in words is "one billion, one hundred twenty-one million, five hundred twenty-five thousand, two hundred".