2011601 has 2 divisors, whose sum is σ = 2011602. Its totient is φ = 2011600.

The previous prime is 2011591. The next prime is 2011613. The reversal of 2011601 is 1061102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1263376 + 748225 = 1124^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011601 - 2¹⁸ = 1749457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005800 + 1005801.

It is an arithmetic number, because the mean of its divisors is an integer number (1005801).

2^2011601 is an apocalyptic number.

It is an amenable number.

2011601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011601 is an equidigital number, since it uses as much as digits as its factorization.

2011601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2011601 is about 1418.3092046518. The cubic root of 2011601 is about 126.2352412248.

Adding to 2011601 its reverse (1061102), we get a palindrome (3072703).

The spelling of 2011601 in words is "two million, eleven thousand, six hundred one".