1300021049 has 2 divisors, whose sum is σ = 1300021050. Its totient is φ = 1300021048.

The previous prime is 1300021013. The next prime is 1300021069. The reversal of 1300021049 is 9401200031.

It is an a-pointer prime, because the next prime (1300021069) can be obtained adding 1300021049 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1016334400 + 283686649 = 31880^2 + 16843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300021049 - 2¹² = 1300016953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1300021049.

It is not a weakly prime, because it can be changed into another prime (1300021069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650010524 + 650010525.

It is an arithmetic number, because the mean of its divisors is an integer number (650010525).

Almost surely, 2^1300021049 is an apocalyptic number.

It is an amenable number.

1300021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300021049 is an equidigital number, since it uses as much as digits as its factorization.

1300021049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1300021049 is about 36055.8046505691. The cubic root of 1300021049 is about 1091.3987734726.

The spelling of 1300021049 in words is "one billion, three hundred million, twenty-one thousand, forty-nine".