It is a Curzon number.
It is an unprimeable number.
Almost surely, 21125804890 is an apocalyptic number.
1125804890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
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 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".