1600861 has 2 divisors, whose sum is σ = 1600862. Its totient is φ = 1600860.

The previous prime is 1600813. The next prime is 1600877. The reversal of 1600861 is 1680061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 562500 = 1019^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600861 - 2⁷ = 1600733 is a prime.

1600861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1600811) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800430 + 800431.

It is an arithmetic number, because the mean of its divisors is an integer number (800431).

2^1600861 is an apocalyptic number.

It is an amenable number.

1600861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600861 is an equidigital number, since it uses as much as digits as its factorization.

1600861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1600861 is about 1265.2513584265. The cubic root of 1600861 is about 116.9816855937.

The spelling of 1600861 in words is "one million, six hundred thousand, eight hundred sixty-one".