1297252171 has 2 divisors, whose sum is σ = 1297252172. Its totient is φ = 1297252170.

The previous prime is 1297252097. The next prime is 1297252199. The reversal of 1297252171 is 1712527921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1297252171 - 2⁷ = 1297252043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1297252171.

It is not a weakly prime, because it can be changed into another prime (1297252471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648626085 + 648626086.

It is an arithmetic number, because the mean of its divisors is an integer number (648626086).

Almost surely, 2^1297252171 is an apocalyptic number.

1297252171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297252171 is an equidigital number, since it uses as much as digits as its factorization.

1297252171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 37.

The square root of 1297252171 is about 36017.3870651384. The cubic root of 1297252171 is about 1090.6233762709.

The spelling of 1297252171 in words is "one billion, two hundred ninety-seven million, two hundred fifty-two thousand, one hundred seventy-one".