1671671 has 2 divisors, whose sum is σ = 1671672. Its totient is φ = 1671670.

The previous prime is 1671643. The next prime is 1671679. The reversal of 1671671 is 1761761.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671671 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835835 + 835836.

It is an arithmetic number, because the mean of its divisors is an integer number (835836).

2^1671671 is an apocalyptic number.

1671671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671671 is an equidigital number, since it uses as much as digits as its factorization.

1671671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 29.

The square root of 1671671 is about 1292.9311659945. The cubic root of 1671671 is about 118.6816574435.

The spelling of 1671671 in words is "one million, six hundred seventy-one thousand, six hundred seventy-one".