1145021500 has 144 divisors (see below), whose sum is σ = 2967531840. Its totient is φ = 378067200.

The previous prime is 1145021483. The next prime is 1145021509. The reversal of 1145021500 is 51205411.

It is a super-2 number, since 2×1145021500² = 2622148470924500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145021509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2943306 + ... + 2943694.

It is an arithmetic number, because the mean of its divisors is an integer number (20607860).

Almost surely, 2^1145021500 is an apocalyptic number.

1145021500 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 1145021500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483765920).

1145021500 is an abundant number, since it is smaller than the sum of its proper divisors (1822510340).

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

1145021500 is a wasteful number, since it uses less digits than its factorization.

1145021500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1145021500 is about 33838.1663214779. The cubic root of 1145021500 is about 1046.1755046504.

Adding to 1145021500 its reverse (51205411), we get a palindrome (1196226911).

The spelling of 1145021500 in words is "one billion, one hundred forty-five million, twenty-one thousand, five hundred".