1248779171 has 2 divisors, whose sum is σ = 1248779172. Its totient is φ = 1248779170.

The previous prime is 1248779167. The next prime is 1248779173. The reversal of 1248779171 is 1719778421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1248779171 - 2² = 1248779167 is a prime.

Together with 1248779173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1248779173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624389585 + 624389586.

It is an arithmetic number, because the mean of its divisors is an integer number (624389586).

Almost surely, 2^1248779171 is an apocalyptic number.

1248779171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248779171 is an equidigital number, since it uses as much as digits as its factorization.

1248779171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 47.

The square root of 1248779171 is about 35338.0697124220. The cubic root of 1248779171 is about 1076.8665379379.

The spelling of 1248779171 in words is "one billion, two hundred forty-eight million, seven hundred seventy-nine thousand, one hundred seventy-one".