1305140297 has 2 divisors, whose sum is σ = 1305140298. Its totient is φ = 1305140296.

The previous prime is 1305140261. The next prime is 1305140351. The reversal of 1305140297 is 7920415031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1286226496 + 18913801 = 35864^2 + 4349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305140297 - 2¹⁴ = 1305123913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305140797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652570148 + 652570149.

It is an arithmetic number, because the mean of its divisors is an integer number (652570149).

Almost surely, 2^1305140297 is an apocalyptic number.

It is an amenable number.

1305140297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305140297 is an equidigital number, since it uses as much as digits as its factorization.

1305140297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1305140297 is about 36126.7255228038. The cubic root of 1305140297 is about 1092.8294742235.

The spelling of 1305140297 in words is "one billion, three hundred five million, one hundred forty thousand, two hundred ninety-seven".