16171247 has 2 divisors, whose sum is σ = 16171248. Its totient is φ = 16171246.

The previous prime is 16171229. The next prime is 16171249. The reversal of 16171247 is 74217161.

It is a strong prime.

It is an emirp because it is prime and its reverse (74217161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16171247 - 2⁸ = 16170991 is a prime.

Together with 16171249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16171249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8085623 + 8085624.

It is an arithmetic number, because the mean of its divisors is an integer number (8085624).

Almost surely, 2^16171247 is an apocalyptic number.

16171247 is a deficient number, since it is larger than the sum of its proper divisors (1).

16171247 is an equidigital number, since it uses as much as digits as its factorization.

16171247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 16171247 is about 4021.3489030424. The cubic root of 16171247 is about 252.8800120521.

The spelling of 16171247 in words is "sixteen million, one hundred seventy-one thousand, two hundred forty-seven".