1125515000 has 80 divisors (see below), whose sum is σ = 2655181320. Its totient is φ = 447120000.

The previous prime is 1125514997. The next prime is 1125515029. The reversal of 1125515000 is 5155211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 814310 + ... + 815690.

Almost surely, 2^1125515000 is an apocalyptic number.

1125515000 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 1125515000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327590660).

1125515000 is an abundant number, since it is smaller than the sum of its proper divisors (1529666320).

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

1125515000 is a wasteful number, since it uses less digits than its factorization.

1125515000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 1125515000 is about 33548.6959508116. The cubic root of 1125515000 is about 1040.2005900069.

The spelling of 1125515000 in words is "one billion, one hundred twenty-five million, five hundred fifteen thousand".