1145531250 has 84 divisors (see below), whose sum is σ = 3103202466. Its totient is φ = 305400000.

The previous prime is 1145531207. The next prime is 1145531263. The reversal of 1145531250 is 521355411.

It can be written as a sum of positive squares in 7 ways, for example, as 856089081 + 289442169 = 29259^2 + 17013^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 279214 + ... + 283286.

Almost surely, 2^1145531250 is an apocalyptic number.

1145531250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145531250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551601233).

1145531250 is an abundant number, since it is smaller than the sum of its proper divisors (1957671216).

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

1145531250 is an frugal number, since it uses more digits than its factorization.

1145531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111 (or 4083 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1145531250 is about 33845.6976586390. The cubic root of 1145531250 is about 1046.3307299294.

Adding to 1145531250 its reverse (521355411), we get a palindrome (1666886661).

The spelling of 1145531250 in words is "one billion, one hundred forty-five million, five hundred thirty-one thousand, two hundred fifty".