1297520647 has 2 divisors, whose sum is σ = 1297520648. Its totient is φ = 1297520646.

The previous prime is 1297520617. The next prime is 1297520671. The reversal of 1297520647 is 7460257921.

It is a strong prime.

It is an emirp because it is prime and its reverse (7460257921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297520647 - 2¹⁵ = 1297487879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297520617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648760323 + 648760324.

It is an arithmetic number, because the mean of its divisors is an integer number (648760324).

Almost surely, 2^1297520647 is an apocalyptic number.

1297520647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297520647 is an equidigital number, since it uses as much as digits as its factorization.

1297520647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 1297520647 is about 36021.1139055971. The cubic root of 1297520647 is about 1090.6986086251.

The spelling of 1297520647 in words is "one billion, two hundred ninety-seven million, five hundred twenty thousand, six hundred forty-seven".