1298660747 has 2 divisors, whose sum is σ = 1298660748. Its totient is φ = 1298660746.

The previous prime is 1298660731. The next prime is 1298660767. The reversal of 1298660747 is 7470668921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298660747 - 2⁴ = 1298660731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1298660695 and 1298660704.

It is not a weakly prime, because it can be changed into another prime (1298660767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649330373 + 649330374.

It is an arithmetic number, because the mean of its divisors is an integer number (649330374).

Almost surely, 2^1298660747 is an apocalyptic number.

1298660747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298660747 is an equidigital number, since it uses as much as digits as its factorization.

1298660747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1298660747 is about 36036.9358714084. The cubic root of 1298660747 is about 1091.0179719307.

The spelling of 1298660747 in words is "one billion, two hundred ninety-eight million, six hundred sixty thousand, seven hundred forty-seven".