3956665 has 8 divisors (see below), whose sum is σ = 5027400. Its totient is φ = 2979072.

The previous prime is 3956663. The next prime is 3956671. The reversal of 3956665 is 5666593.

It can be written as a sum of positive squares in 4 ways, for example, as 1951609 + 2005056 = 1397^2 + 1416^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3956665 - 2¹ = 3956663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3956663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23190 + ... + 23359.

It is an arithmetic number, because the mean of its divisors is an integer number (628425).

Almost surely, 2^3956665 is an apocalyptic number.

It is an amenable number.

3956665 is a deficient number, since it is larger than the sum of its proper divisors (1070735).

3956665 is a wasteful number, since it uses less digits than its factorization.

3956665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46571.

The product of its digits is 145800, while the sum is 40.

The square root of 3956665 is about 1989.1367474359. The cubic root of 3956665 is about 158.1647722917.

The spelling of 3956665 in words is "three million, nine hundred fifty-six thousand, six hundred sixty-five".