2105920 has 28 divisors (see below), whose sum is σ = 5015484. Its totient is φ = 842240.

The previous prime is 2105911. The next prime is 2105921. The reversal of 2105920 is 295012.

It can be written as a sum of positive squares in 2 ways, for example, as 627264 + 1478656 = 792^2 + 1216^2 .

It is not an unprimeable number, because it can be changed into a prime (2105921) 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, 2971 + ... + 3610.

2^2105920 is an apocalyptic number.

2105920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105920 is an abundant number, since it is smaller than the sum of its proper divisors (2909564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105920 is an equidigital number, since it uses as much as digits as its factorization.

2105920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6598 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2105920 is about 1451.1788311576. The cubic root of 2105920 is about 128.1781373882.

It can be divided in two parts, 2105 and 920, that added together give a square (3025 = 55²).

The spelling of 2105920 in words is "two million, one hundred five thousand, nine hundred twenty".