13945571 has 2 divisors, whose sum is σ = 13945572. Its totient is φ = 13945570.

The previous prime is 13945543. The next prime is 13945573. The reversal of 13945571 is 17554931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13945571 is a prime.

Together with 13945573, 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 (13945573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6972785 + 6972786.

It is an arithmetic number, because the mean of its divisors is an integer number (6972786).

Almost surely, 2^13945571 is an apocalyptic number.

13945571 is a deficient number, since it is larger than the sum of its proper divisors (1).

13945571 is an equidigital number, since it uses as much as digits as its factorization.

13945571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The square root of 13945571 is about 3734.3769225936. The cubic root of 13945571 is about 240.7014835521.

The spelling of 13945571 in words is "thirteen million, nine hundred forty-five thousand, five hundred seventy-one".