1305140971 has 2 divisors, whose sum is σ = 1305140972. Its totient is φ = 1305140970.

The previous prime is 1305140959. The next prime is 1305141029. The reversal of 1305140971 is 1790415031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1305140971 - 2¹³ = 1305132779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305140071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652570485 + 652570486.

It is an arithmetic number, because the mean of its divisors is an integer number (652570486).

Almost surely, 2^1305140971 is an apocalyptic number.

1305140971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305140971 is an equidigital number, since it uses as much as digits as its factorization.

1305140971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1305140971 is about 36126.7348510767. The cubic root of 1305140971 is about 1092.8296623429.

The spelling of 1305140971 in words is "one billion, three hundred five million, one hundred forty thousand, nine hundred seventy-one".