1628171 has 2 divisors, whose sum is σ = 1628172. Its totient is φ = 1628170.

The previous prime is 1628161. The next prime is 1628173. The reversal of 1628171 is 1718261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1628171 - 2¹⁰ = 1627147 is a prime.

Together with 1628173, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1628171.

It is not a weakly prime, because it can be changed into another prime (1628173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814085 + 814086.

It is an arithmetic number, because the mean of its divisors is an integer number (814086).

2^1628171 is an apocalyptic number.

1628171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628171 is an equidigital number, since it uses as much as digits as its factorization.

1628171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 1628171 is about 1275.9980407508. The cubic root of 1628171 is about 117.6431573363.

The spelling of 1628171 in words is "one million, six hundred twenty-eight thousand, one hundred seventy-one".