2108761 has 2 divisors, whose sum is σ = 2108762. Its totient is φ = 2108760.

The previous prime is 2108759. The next prime is 2108767. The reversal of 2108761 is 1678012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 20736 = 1445^2 + 144^2 .

It is a cyclic number.

It is not a de Polignac number, because 2108761 - 2¹ = 2108759 is a prime.

Together with 2108759, it forms a pair of twin primes.

2108761 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2108767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054380 + 1054381.

It is an arithmetic number, because the mean of its divisors is an integer number (1054381).

2^2108761 is an apocalyptic number.

It is an amenable number.

2108761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108761 is an equidigital number, since it uses as much as digits as its factorization.

2108761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2108761 is about 1452.1573606190. The cubic root of 2108761 is about 128.2357512349.

The spelling of 2108761 in words is "two million, one hundred eight thousand, seven hundred sixty-one".