1125585899 has 4 divisors (see below), whose sum is σ = 1129649664. Its totient is φ = 1121522136.

The previous prime is 1125585883. The next prime is 1125585911. The reversal of 1125585899 is 9985855211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9985855211 = 50441 ⋅197971.

It is a cyclic number.

It is not a de Polignac number, because 1125585899 - 2⁴ = 1125585883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125585899.

It is not an unprimeable number, because it can be changed into a prime (1125585299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031467 + ... + 2032020.

It is an arithmetic number, because the mean of its divisors is an integer number (282412416).

Almost surely, 2^1125585899 is an apocalyptic number.

1125585899 is a deficient number, since it is larger than the sum of its proper divisors (4063765).

1125585899 is an equidigital number, since it uses as much as digits as its factorization.

1125585899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063764.

The product of its digits is 1296000, while the sum is 53.

The square root of 1125585899 is about 33549.7525922323. The cubic root of 1125585899 is about 1040.2224311591. Note that the first 3 decimals are identical.

The spelling of 1125585899 in words is "one billion, one hundred twenty-five million, five hundred eighty-five thousand, eight hundred ninety-nine".