2061611 has 4 divisors (see below), whose sum is σ = 2064792. Its totient is φ = 2058432.

The previous prime is 2061601. The next prime is 2061613. The reversal of 2061611 is 1161602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2061611.

It is not an unprimeable number, because it can be changed into a prime (2061613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (516198).

2^2061611 is an apocalyptic number.

2061611 is a deficient number, since it is larger than the sum of its proper divisors (3181).

2061611 is an equidigital number, since it uses as much as digits as its factorization.

2061611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2061611 is about 1435.8311182030. The cubic root of 2061611 is about 127.2727928416.

Subtracting from 2061611 its reverse (1161602), we obtain a palindrome (900009).

The spelling of 2061611 in words is "two million, sixty-one thousand, six hundred eleven".