1306562641 has 2 divisors, whose sum is σ = 1306562642. Its totient is φ = 1306562640.

The previous prime is 1306562639. The next prime is 1306562651. The reversal of 1306562641 is 1462656031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835499025 + 471063616 = 28905^2 + 21704^2 .

It is an emirp because it is prime and its reverse (1462656031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306562641 - 2¹ = 1306562639 is a prime.

Together with 1306562639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1306562597 and 1306562606.

It is not a weakly prime, because it can be changed into another prime (1306562651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653281320 + 653281321.

It is an arithmetic number, because the mean of its divisors is an integer number (653281321).

Almost surely, 2^1306562641 is an apocalyptic number.

It is an amenable number.

1306562641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306562641 is an equidigital number, since it uses as much as digits as its factorization.

1306562641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1306562641 is about 36146.4056442684. The cubic root of 1306562641 is about 1093.2263192053.

The spelling of 1306562641 in words is "one billion, three hundred six million, five hundred sixty-two thousand, six hundred forty-one".