2001611 has 2 divisors, whose sum is σ = 2001612. Its totient is φ = 2001610.

The previous prime is 2001583. The next prime is 2001617. The reversal of 2001611 is 1161002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001611 - 2⁶ = 2001547 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001592 and 2001601.

It is not a weakly prime, because it can be changed into another prime (2001617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000805 + 1000806.

It is an arithmetic number, because the mean of its divisors is an integer number (1000806).

2^2001611 is an apocalyptic number.

2001611 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001611 is an equidigital number, since it uses as much as digits as its factorization.

2001611 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 2001611 is about 1414.7830222334. The cubic root of 2001611 is about 126.0259247907.

Adding to 2001611 its reverse (1161002), we get a palindrome (3162613).

The spelling of 2001611 in words is "two million, one thousand, six hundred eleven".