1125405200 has 30 divisors (see below), whose sum is σ = 2703786954. Its totient is φ = 450161920.

The previous prime is 1125405191. The next prime is 1125405241. The reversal of 1125405200 is 25045211.

It can be written as a sum of positive squares in 3 ways, for example, as 55591936 + 1069813264 = 7456^2 + 32708^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1406357 + ... + 1407156.

Almost surely, 2^1125405200 is an apocalyptic number.

1125405200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125405200 is an abundant number, since it is smaller than the sum of its proper divisors (1578381754).

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

1125405200 is a wasteful number, since it uses less digits than its factorization.

1125405200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813531 (or 2813520 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1125405200 is about 33547.0594836567. The cubic root of 1125405200 is about 1040.1667631990.

The spelling of 1125405200 in words is "one billion, one hundred twenty-five million, four hundred five thousand, two hundred".