2061 has 6 divisors (see below), whose sum is σ = 2990.
Its totient is φ = 1368.
The previous prime is 2053. The next prime is 2063. The reversal of 2061 is 1602.
Adding to 2061 its reverse (1602), we get a palindrome (3663).
It can be divided in two parts, 20 and 61, that added together give a 4-th power (81 = 34).
It can be written as a sum of positive squares in only one way, i.e., 2025 + 36 = 45^2 + 6^2
It is not a de Polignac number, because 2061 - 23 = 2053 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 229 = 2061 / (2 + 0 + 6 + 1).
It is a Duffinian number.
It is a plaindrome in base 12.
It is a nialpdrome in base 3 and base 14.
It is a zygodrome in base 3.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2063) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106 + ... + 123.
It is an amenable number.
2061 is a deficient number, since it is larger than the sum of its proper divisors (929).
2061 is a wasteful number, since it uses less digits than its factorization.
2061 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 235 (or 232 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 9.
The square root of 2061 is about 45.3982378513.
The cubic root of 2061 is about 12.7260218313.
The spelling of 2061 in words is "two thousand, sixty-one".