1298562641 has 2 divisors, whose sum is σ = 1298562642. Its totient is φ = 1298562640.

The previous prime is 1298562563. The next prime is 1298562653. The reversal of 1298562641 is 1462658921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657409600 + 641153041 = 25640^2 + 25321^2 .

It is an emirp because it is prime and its reverse (1462658921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1298562641 - 2¹⁴ = 1298546257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1298562592 and 1298562601.

It is not a weakly prime, because it can be changed into another prime (1298562691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649281320 + 649281321.

It is an arithmetic number, because the mean of its divisors is an integer number (649281321).

Almost surely, 2^1298562641 is an apocalyptic number.

It is an amenable number.

1298562641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298562641 is an equidigital number, since it uses as much as digits as its factorization.

1298562641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 1298562641 is about 36035.5746589395. The cubic root of 1298562641 is about 1090.9904979593.

The spelling of 1298562641 in words is "one billion, two hundred ninety-eight million, five hundred sixty-two thousand, six hundred forty-one".