16257971 has 2 divisors, whose sum is σ = 16257972. Its totient is φ = 16257970.

The previous prime is 16257959. The next prime is 16257973. The reversal of 16257971 is 17975261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16257971 - 2⁶ = 16257907 is a prime.

Together with 16257973, 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 (16257973) 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, 8128985 + 8128986.

It is an arithmetic number, because the mean of its divisors is an integer number (8128986).

Almost surely, 2^16257971 is an apocalyptic number.

16257971 is a deficient number, since it is larger than the sum of its proper divisors (1).

16257971 is an equidigital number, since it uses as much as digits as its factorization.

16257971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 16257971 is about 4032.1174338057. The cubic root of 16257971 is about 253.3312590243.

The spelling of 16257971 in words is "sixteen million, two hundred fifty-seven thousand, nine hundred seventy-one".