1306229021 has 2 divisors, whose sum is σ = 1306229022. Its totient is φ = 1306229020.

The previous prime is 1306229003. The next prime is 1306229069. The reversal of 1306229021 is 1209226031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828806521 + 477422500 = 28789^2 + 21850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306229021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306223021) 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, 653114510 + 653114511.

It is an arithmetic number, because the mean of its divisors is an integer number (653114511).

Almost surely, 2^1306229021 is an apocalyptic number.

It is an amenable number.

1306229021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306229021 is an equidigital number, since it uses as much as digits as its factorization.

1306229021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1306229021 is about 36141.7905062823. The cubic root of 1306229021 is about 1093.1332625081.

The spelling of 1306229021 in words is "one billion, three hundred six million, two hundred twenty-nine thousand, twenty-one".