2125765 has 16 divisors (see below), whose sum is σ = 2741040. Its totient is φ = 1576960.

The previous prime is 2125757. The next prime is 2125771. The reversal of 2125765 is 5675212.

2125765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 1458²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 2125764 = 1^2 + 1458^2 .

It is not a de Polignac number, because 2125765 - 2³ = 2125757 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7425 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (171315).

2^2125765 is an apocalyptic number.

It is an amenable number.

2125765 is a deficient number, since it is larger than the sum of its proper divisors (615275).

2125765 is a wasteful number, since it uses less digits than its factorization.

2125765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392.

The product of its digits is 4200, while the sum is 28.

The square root of 2125765 is about 1458.0003429355. Note that the first 3 decimals coincide. The cubic root of 2125765 is about 128.5795053715.

It can be divided in two parts, 2125 and 765, that multiplied together give a square (1625625 = 1275²).

The spelling of 2125765 in words is "two million, one hundred twenty-five thousand, seven hundred sixty-five".