1045212500 has 36 divisors (see below), whose sum is σ = 2286283356. Its totient is φ = 418080000.

The previous prime is 1045212499. The next prime is 1045212503. The reversal of 1045212500 is 52125401.

It can be written as a sum of positive squares in 6 ways, for example, as 752734096 + 292478404 = 27436^2 + 17102^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045212503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29309 + ... + 54308.

It is an arithmetic number, because the mean of its divisors is an integer number (63507871).

Almost surely, 2^1045212500 is an apocalyptic number.

1045212500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045212500 is an abundant number, since it is smaller than the sum of its proper divisors (1241070856).

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

1045212500 is an frugal number, since it uses more digits than its factorization.

1045212500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83646 (or 83624 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1045212500 is about 32329.7463646098. The cubic root of 1045212500 is about 1014.8492419283.

Adding to 1045212500 its reverse (52125401), we get a palindrome (1097337901).

The spelling of 1045212500 in words is "one billion, forty-five million, two hundred twelve thousand, five hundred".