1125555400 has 24 divisors (see below), whose sum is σ = 2616916770. Its totient is φ = 450222080.

The previous prime is 1125555377. The next prime is 1125555433. The reversal of 1125555400 is 45555211.

It can be written as a sum of positive squares in 3 ways, for example, as 886729284 + 238826116 = 29778^2 + 15454^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2813689 + ... + 2814088.

Almost surely, 2^1125555400 is an apocalyptic number.

1125555400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125555400 is an abundant number, since it is smaller than the sum of its proper divisors (1491361370).

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

1125555400 is a wasteful number, since it uses less digits than its factorization.

1125555400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627793 (or 5627784 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1125555400 is about 33549.2980552500. The cubic root of 1125555400 is about 1040.2130357469.

The spelling of 1125555400 in words is "one billion, one hundred twenty-five million, five hundred fifty-five thousand, four hundred".