2125805 has 8 divisors (see below), whose sum is σ = 2782944. Its totient is φ = 1546000.

The previous prime is 2125801. The next prime is 2125813. The reversal of 2125805 is 5085212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2125805 - 2² = 2125801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19271 + ... + 19380.

It is an arithmetic number, because the mean of its divisors is an integer number (347868).

2^2125805 is an apocalyptic number.

It is an amenable number.

2125805 is a deficient number, since it is larger than the sum of its proper divisors (657139).

2125805 is a wasteful number, since it uses less digits than its factorization.

2125805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38667.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2125805 is about 1458.0140602889. The cubic root of 2125805 is about 128.5803118495.

The spelling of 2125805 in words is "two million, one hundred twenty-five thousand, eight hundred five".