1145431300 has 54 divisors (see below), whose sum is σ = 2691532158. Its totient is φ = 422922240.

The previous prime is 1145431229. The next prime is 1145431319. The reversal of 1145431300 is 31345411.

It can be written as a sum of positive squares in 9 ways, for example, as 622302916 + 523128384 = 24946^2 + 22872^2 .

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 17 ways as a sum of consecutive naturals, for example, 16989 + ... + 50788.

Almost surely, 2^1145431300 is an apocalyptic number.

1145431300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145431300 is an abundant number, since it is smaller than the sum of its proper divisors (1546100858).

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

1145431300 is a wasteful number, since it uses less digits than its factorization.

1145431300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67817 (or 67797 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1145431300 is about 33844.2210724372. The cubic root of 1145431300 is about 1046.3002975286.

Adding to 1145431300 its reverse (31345411), we get a palindrome (1176776711).

The spelling of 1145431300 in words is "one billion, one hundred forty-five million, four hundred thirty-one thousand, three hundred".