1145000000 has 112 divisors (see below), whose sum is σ = 2852531760. Its totient is φ = 456000000.

The previous prime is 1144999993. The next prime is 1145000029. The reversal of 1145000000 is 5411.

It can be written as a sum of positive squares in 8 ways, for example, as 1082146816 + 62853184 = 32896^2 + 7928^2 .

It is a super-2 number, since 2×1145000000² = 2622050000000000000, which contains 22 as substring.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4999886 + ... + 5000114.

Almost surely, 2^1145000000 is an apocalyptic number.

1145000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426265880).

1145000000 is an abundant number, since it is smaller than the sum of its proper divisors (1707531760).

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

1145000000 is an frugal number, since it uses more digits than its factorization.

1145000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1145000000 is about 33837.8486313773. The cubic root of 1145000000 is about 1046.1689566179.

Adding to 1145000000 its reverse (5411), we get a palindrome (1145005411).

The spelling of 1145000000 in words is "one billion, one hundred forty-five million", and thus it is an aban number.