1021145300 has 90 divisors (see below), whose sum is σ = 2585653518. Its totient is φ = 350024640.

The previous prime is 1021145269. The next prime is 1021145317. The reversal of 1021145300 is 35411201.

It can be written as a sum of positive squares in 3 ways, for example, as 470596 + 1020674704 = 686^2 + 31948^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 237974 + ... + 242226.

Almost surely, 2^1021145300 is an apocalyptic number.

1021145300 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 1021145300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292826759).

1021145300 is an abundant number, since it is smaller than the sum of its proper divisors (1564508218).

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

1021145300 is an equidigital number, since it uses as much as digits as its factorization.

1021145300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1021145300 is about 31955.3641819335. The cubic root of 1021145300 is about 1006.9993284344. Note that the first 3 decimals are identical.

Adding to 1021145300 its reverse (35411201), we get a palindrome (1056556501).

The spelling of 1021145300 in words is "one billion, twenty-one million, one hundred forty-five thousand, three hundred".