2010861 has 6 divisors (see below), whose sum is σ = 2904590. Its totient is φ = 1340568.

The previous prime is 2010733. The next prime is 2010881. The reversal of 2010861 is 1680102.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 585225 = 1194^2 + 765^2 .

It is not a de Polignac number, because 2010861 - 2⁷ = 2010733 is a prime.

It is a super-2 number, since 2×2010861² = 8087123922642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010881) 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, 111706 + ... + 111723.

2^2010861 is an apocalyptic number.

It is an amenable number.

2010861 is a deficient number, since it is larger than the sum of its proper divisors (893729).

2010861 is a wasteful number, since it uses less digits than its factorization.

2010861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223435 (or 223432 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2010861 is about 1418.0483066525. The cubic root of 2010861 is about 126.2197601005.

Adding to 2010861 its reverse (1680102), we get a palindrome (3690963).

The spelling of 2010861 in words is "two million, ten thousand, eight hundred sixty-one".