1297648601 has 2 divisors, whose sum is σ = 1297648602. Its totient is φ = 1297648600.

The previous prime is 1297648591. The next prime is 1297648609. The reversal of 1297648601 is 1068467921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190319001 + 107329600 = 34501^2 + 10360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297648601 - 2¹⁰ = 1297647577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297648609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648824300 + 648824301.

It is an arithmetic number, because the mean of its divisors is an integer number (648824301).

Almost surely, 2^1297648601 is an apocalyptic number.

It is an amenable number.

1297648601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297648601 is an equidigital number, since it uses as much as digits as its factorization.

1297648601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1297648601 is about 36022.8899590247. The cubic root of 1297648601 is about 1090.7344602479.

The spelling of 1297648601 in words is "one billion, two hundred ninety-seven million, six hundred forty-eight thousand, six hundred one".