3715865 has 4 divisors (see below), whose sum is σ = 4459044. Its totient is φ = 2972688.

The previous prime is 3715853. The next prime is 3715889. The reversal of 3715865 is 5685173.

3715865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5685173 = 13 ⋅437321.

It can be written as a sum of positive squares in 2 ways, for example, as 2085136 + 1630729 = 1444^2 + 1277^2 .

It is a cyclic number.

It is not a de Polignac number, because 3715865 - 2¹² = 3711769 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 371582 + ... + 371591.

It is an arithmetic number, because the mean of its divisors is an integer number (1114761).

Almost surely, 2^3715865 is an apocalyptic number.

It is an amenable number.

3715865 is a deficient number, since it is larger than the sum of its proper divisors (743179).

3715865 is an equidigital number, since it uses as much as digits as its factorization.

3715865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743178.

The product of its digits is 25200, while the sum is 35.

The square root of 3715865 is about 1927.6579053349. The cubic root of 3715865 is about 154.8887859868. Note that the first 3 decimals are identical.

The spelling of 3715865 in words is "three million, seven hundred fifteen thousand, eight hundred sixty-five".