1125304400 has 120 divisors (see below), whose sum is σ = 3051367200. Its totient is φ = 395046400.

The previous prime is 1125304357. The next prime is 1125304423. The reversal of 1125304400 is 44035211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123191 + ... + 132009.

It is an arithmetic number, because the mean of its divisors is an integer number (25428060).

Almost surely, 2^1125304400 is an apocalyptic number.

1125304400 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 1125304400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525683600).

1125304400 is an abundant number, since it is smaller than the sum of its proper divisors (1926062800).

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

1125304400 is a wasteful number, since it uses less digits than its factorization.

1125304400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877 (or 8866 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1125304400 is about 33545.5570828687. The cubic root of 1125304400 is about 1040.1357071432.

Adding to 1125304400 its reverse (44035211), we get a palindrome (1169339611).

The spelling of 1125304400 in words is "one billion, one hundred twenty-five million, three hundred four thousand, four hundred".