1601659 has 2 divisors, whose sum is σ = 1601660. Its totient is φ = 1601658.

The previous prime is 1601653. The next prime is 1601671. The reversal of 1601659 is 9561061.

It is a weak prime.

It is an emirp because it is prime and its reverse (9561061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1601659 - 2⁵ = 1601627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1601653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800829 + 800830.

It is an arithmetic number, because the mean of its divisors is an integer number (800830).

2^1601659 is an apocalyptic number.

1601659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601659 is an equidigital number, since it uses as much as digits as its factorization.

1601659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1601659 is about 1265.5666714954. The cubic root of 1601659 is about 117.0011201101.

The spelling of 1601659 in words is "one million, six hundred one thousand, six hundred fifty-nine".