1125804890 has 40 divisors (see below), whose sum is σ = 2364100020. Its totient is φ = 385982016.

The previous prime is 1125804881. The next prime is 1125804907. The reversal of 1125804890 is 984085211.

It can be written as a sum of positive squares in 2 ways, for example, as 1120040089 + 5764801 = 33467^2 + 2401^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 566 + ... + 47454.

Almost surely, 2^1125804890 is an apocalyptic number.

1125804890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125804890 is an abundant number, since it is smaller than the sum of its proper divisors (1238295130).

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

1125804890 is an frugal number, since it uses more digits than its factorization.

1125804890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46924 (or 46903 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 1125804890 is about 33553.0161088389. The cubic root of 1125804890 is about 1040.2898877548.

The spelling of 1125804890 in words is "one billion, one hundred twenty-five million, eight hundred four thousand, eight hundred ninety".