1605941 has 2 divisors, whose sum is σ = 1605942. Its totient is φ = 1605940.

The previous prime is 1605931. The next prime is 1605971. The reversal of 1605941 is 1495061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 461041 = 1070^2 + 679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605941 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1605941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802970 + 802971.

It is an arithmetic number, because the mean of its divisors is an integer number (802971).

2^1605941 is an apocalyptic number.

It is an amenable number.

1605941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605941 is an equidigital number, since it uses as much as digits as its factorization.

1605941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1605941 is about 1267.2572745895. The cubic root of 1605941 is about 117.1052939674.

The spelling of 1605941 in words is "one million, six hundred five thousand, nine hundred forty-one".