1000115000 has 40 divisors (see below), whose sum is σ = 2343281160. Its totient is φ = 400044000.

The previous prime is 1000114993. The next prime is 1000115041. The reversal of 1000115000 is 5110001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 95012 + ... + 105011.

It is an arithmetic number, because the mean of its divisors is an integer number (58582029).

Almost surely, 2^1000115000 is an apocalyptic number.

1000115000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000115000 is an abundant number, since it is smaller than the sum of its proper divisors (1343166160).

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

1000115000 is an equidigital number, since it uses as much as digits as its factorization.

1000115000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200049 (or 200030 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 1000115000 is about 31624.5948590650. The cubic root of 1000115000 is about 1000.0383318640.

Adding to 1000115000 its reverse (5110001), we get a palindrome (1005225001).

The spelling of 1000115000 in words is "one billion, one hundred fifteen thousand".