16402171 has 2 divisors, whose sum is σ = 16402172. Its totient is φ = 16402170.

The previous prime is 16402163. The next prime is 16402181. The reversal of 16402171 is 17120461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16402171 - 2³ = 16402163 is a prime.

It is not a weakly prime, because it can be changed into another prime (16402121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201085 + 8201086.

It is an arithmetic number, because the mean of its divisors is an integer number (8201086).

Almost surely, 2^16402171 is an apocalyptic number.

16402171 is a deficient number, since it is larger than the sum of its proper divisors (1).

16402171 is an equidigital number, since it uses as much as digits as its factorization.

16402171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 16402171 is about 4049.9593825124. The cubic root of 16402171 is about 254.0780290164.

The spelling of 16402171 in words is "sixteen million, four hundred two thousand, one hundred seventy-one".