245285771 has 2 divisors, whose sum is σ = 245285772. Its totient is φ = 245285770.

The previous prime is 245285753. The next prime is 245285773. The reversal of 245285771 is 177582542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245285771 is a prime.

Together with 245285773, 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 (245285773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122642885 + 122642886.

It is an arithmetic number, because the mean of its divisors is an integer number (122642886).

Almost surely, 2^245285771 is an apocalyptic number.

245285771 is a deficient number, since it is larger than the sum of its proper divisors (1).

245285771 is an equidigital number, since it uses as much as digits as its factorization.

245285771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 41.

The square root of 245285771 is about 15661.6018018592. The cubic root of 245285771 is about 625.9756673779.

The spelling of 245285771 in words is "two hundred forty-five million, two hundred eighty-five thousand, seven hundred seventy-one".