1601671 has 2 divisors, whose sum is σ = 1601672. Its totient is φ = 1601670.

The previous prime is 1601659. The next prime is 1601687. The reversal of 1601671 is 1761061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1601671 - 2⁷ = 1601543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800835 + 800836.

It is an arithmetic number, because the mean of its divisors is an integer number (800836).

2^1601671 is an apocalyptic number.

1601671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601671 is an equidigital number, since it uses as much as digits as its factorization.

1601671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1601671 is about 1265.5714124458. The cubic root of 1601671 is about 117.0014123092.

The spelling of 1601671 in words is "one million, six hundred one thousand, six hundred seventy-one".