1121585890 has 32 divisors (see below), whose sum is σ = 2094566400. Its totient is φ = 431956800.

The previous prime is 1121585821. The next prime is 1121585909. The reversal of 1121585890 is 985851211.

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 15 ways as a sum of consecutive naturals, for example, 52600 + ... + 70780.

It is an arithmetic number, because the mean of its divisors is an integer number (65455200).

Almost surely, 2^1121585890 is an apocalyptic number.

1121585890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121585890 is a deficient number, since it is larger than the sum of its proper divisors (972980510).

1121585890 is a wasteful number, since it uses less digits than its factorization.

1121585890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18418.

The product of its (nonzero) digits is 28800, while the sum is 40.

The square root of 1121585890 is about 33490.0864436030. The cubic root of 1121585890 is about 1038.9887513708.

The spelling of 1121585890 in words is "one billion, one hundred twenty-one million, five hundred eighty-five thousand, eight hundred ninety".