2067561 has 24 divisors (see below), whose sum is σ = 3201120. Its totient is φ = 1282176.

The previous prime is 2067547. The next prime is 2067581. The reversal of 2067561 is 1657602.

2067561 is a nontrivial binomial coefficient, being equal to C(2034, 2).

It is not a de Polignac number, because 2067561 - 2⁵ = 2067529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2067511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18241 + ... + 18353.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2^2067561 is an apocalyptic number.

2067561 is the 2033-rd triangular number and also the 1017-th hexagonal number.

It is an amenable number.

2067561 is a deficient number, since it is larger than the sum of its proper divisors (1133559).

2067561 is a wasteful number, since it uses less digits than its factorization.

2067561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2067561 is about 1437.9015960767. The cubic root of 2067561 is about 127.3951155888.

It can be divided in two parts, 20675 and 61, that added together give a 4-th power (20736 = 12⁴).

The spelling of 2067561 in words is "two million, sixty-seven thousand, five hundred sixty-one".