1300021300 has 18 divisors (see below), whose sum is σ = 2821046438. Its totient is φ = 520008480.

The previous prime is 1300021277. The next prime is 1300021339. The reversal of 1300021300 is 31200031.

It can be written as a sum of positive squares in 3 ways, for example, as 24245776 + 1275775524 = 4924^2 + 35718^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6500007 + ... + 6500206.

Almost surely, 2^1300021300 is an apocalyptic number.

1300021300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300021300 is an abundant number, since it is smaller than the sum of its proper divisors (1521025138).

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

1300021300 is a wasteful number, since it uses less digits than its factorization.

1300021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13000227 (or 13000220 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1300021300 is about 36055.8081312845. The cubic root of 1300021300 is about 1091.3988437128.

Adding to 1300021300 its reverse (31200031), we get a palindrome (1331221331).

The spelling of 1300021300 in words is "one billion, three hundred million, twenty-one thousand, three hundred".