4125865 has 8 divisors (see below), whose sum is σ = 4962888. Its totient is φ = 3292800.

The previous prime is 4125853. The next prime is 4125899. The reversal of 4125865 is 5685214.

It can be written as a sum of positive squares in 4 ways, for example, as 2319529 + 1806336 = 1523^2 + 1344^2 .

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

It is not a de Polignac number, because 4125865 - 2⁹ = 4125353 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2319 + ... + 3691.

It is an arithmetic number, because the mean of its divisors is an integer number (620361).

Almost surely, 2^4125865 is an apocalyptic number.

It is an amenable number.

4125865 is a deficient number, since it is larger than the sum of its proper divisors (837023).

4125865 is a wasteful number, since it uses less digits than its factorization.

4125865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its digits is 9600, while the sum is 31.

The square root of 4125865 is about 2031.2225382759. Note that the first 3 decimals coincide. The cubic root of 4125865 is about 160.3879258868.

The spelling of 4125865 in words is "four million, one hundred twenty-five thousand, eight hundred sixty-five".