2125565 has 16 divisors (see below), whose sum is σ = 2803248. Its totient is φ = 1537536.

The previous prime is 2125559. The next prime is 2125567. The reversal of 2125565 is 5655212.

2125565 = T₃₉ + T₄₀ + ... + T₂₃₃.

It can be written as a sum of positive squares in 8 ways, for example, as 417316 + 1708249 = 646^2 + 1307^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2125565 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125567) 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 15 ways as a sum of consecutive naturals, for example, 3137 + ... + 3753.

It is an arithmetic number, because the mean of its divisors is an integer number (175203).

2^2125565 is an apocalyptic number.

It is an amenable number.

2125565 is a deficient number, since it is larger than the sum of its proper divisors (677683).

2125565 is a wasteful number, since it uses less digits than its factorization.

2125565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 3000, while the sum is 26.

The square root of 2125565 is about 1457.9317542327. The cubic root of 2125565 is about 128.5754728299.

The spelling of 2125565 in words is "two million, one hundred twenty-five thousand, five hundred sixty-five".