1045021200 has 120 divisors (see below), whose sum is σ = 3358395168. Its totient is φ = 277770240.

The previous prime is 1045021189. The next prime is 1045021213. The reversal of 1045021200 is 21205401.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1045021200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422367 + ... + 424833.

Almost surely, 2^1045021200 is an apocalyptic number.

1045021200 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 1045021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679197584).

1045021200 is an abundant number, since it is smaller than the sum of its proper divisors (2313373968).

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

1045021200 is a wasteful number, since it uses less digits than its factorization.

1045021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2830 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1045021200 is about 32326.7876535854. The cubic root of 1045021200 is about 1014.7873238955.

Adding to 1045021200 its reverse (21205401), we get a palindrome (1066226601).

The spelling of 1045021200 in words is "one billion, forty-five million, twenty-one thousand, two hundred".