1298740507 has 2 divisors, whose sum is σ = 1298740508. Its totient is φ = 1298740506.

The previous prime is 1298740501. The next prime is 1298740511. The reversal of 1298740507 is 7050478921.

It is a strong prime.

It is an emirp because it is prime and its reverse (7050478921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298740507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1298740501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649370253 + 649370254.

It is an arithmetic number, because the mean of its divisors is an integer number (649370254).

Almost surely, 2^1298740507 is an apocalyptic number.

1298740507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298740507 is an equidigital number, since it uses as much as digits as its factorization.

1298740507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 1298740507 is about 36038.0424967839. The cubic root of 1298740507 is about 1091.0403071998.

The spelling of 1298740507 in words is "one billion, two hundred ninety-eight million, seven hundred forty thousand, five hundred seven".