1021300249 has 2 divisors, whose sum is σ = 1021300250. Its totient is φ = 1021300248.

The previous prime is 1021300199. The next prime is 1021300321. The reversal of 1021300249 is 9420031201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782041225 + 239259024 = 27965^2 + 15468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021300249 - 2⁷ = 1021300121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021300649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510650124 + 510650125.

It is an arithmetic number, because the mean of its divisors is an integer number (510650125).

Almost surely, 2^1021300249 is an apocalyptic number.

It is an amenable number.

1021300249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021300249 is an equidigital number, since it uses as much as digits as its factorization.

1021300249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1021300249 is about 31957.7885498981. The cubic root of 1021300249 is about 1007.0502600199.

The spelling of 1021300249 in words is "one billion, twenty-one million, three hundred thousand, two hundred forty-nine".