1125099999 has 12 divisors (see below), whose sum is σ = 1625500656. Its totient is φ = 749902272.

The previous prime is 1125099977. The next prime is 1125100007. The reversal of 1125099999 is 9999905211.

It is not a de Polignac number, because 1125099999 - 2²⁷ = 990882271 is a prime.

1125099999 is a modest number, since divided by 99999 gives 11250 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125099929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41239 + ... + 62855.

It is an arithmetic number, because the mean of its divisors is an integer number (135458388).

Almost surely, 2^1125099999 is an apocalyptic number.

1125099999 is a deficient number, since it is larger than the sum of its proper divisors (500400657).

1125099999 is a wasteful number, since it uses less digits than its factorization.

1125099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27406 (or 27403 counting only the distinct ones).

The product of its (nonzero) digits is 590490, while the sum is 54.

The square root of 1125099999 is about 33542.5103264499. The cubic root of 1125099999 is about 1040.0727263614.

The spelling of 1125099999 in words is "one billion, one hundred twenty-five million, ninety-nine thousand, nine hundred ninety-nine".