2105725 has 6 divisors (see below), whose sum is σ = 2611130. Its totient is φ = 1684560.

The previous prime is 2105717. The next prime is 2105729. The reversal of 2105725 is 5275012.

It can be written as a sum of positive squares in 3 ways, for example, as 324 + 2105401 = 18^2 + 1451^2 .

It is not a de Polignac number, because 2105725 - 2³ = 2105717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105696 and 2105705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105729) 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, 42090 + ... + 42139.

2^2105725 is an apocalyptic number.

2105725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105725 is a deficient number, since it is larger than the sum of its proper divisors (505405).

2105725 is an equidigital number, since it uses as much as digits as its factorization.

2105725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84239 (or 84234 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2105725 is about 1451.1116428449. Note that the first 3 decimals coincide. The cubic root of 2105725 is about 128.1741810004.

The spelling of 2105725 in words is "two million, one hundred five thousand, seven hundred twenty-five".