3815965 has 8 divisors (see below), whose sum is σ = 4737240. Its totient is φ = 2947392.

The previous prime is 3815963. The next prime is 3816011. The reversal of 3815965 is 5695183.

It can be written as a sum of positive squares in 4 ways, for example, as 597529 + 3218436 = 773^2 + 1794^2 .

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 3815965 - 2¹ = 3815963 is a prime.

3815965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3815963) 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, 13014 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (592155).

Almost surely, 2^3815965 is an apocalyptic number.

It is an amenable number.

3815965 is a deficient number, since it is larger than the sum of its proper divisors (921275).

3815965 is a wasteful number, since it uses less digits than its factorization.

3815965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26351.

The product of its digits is 32400, while the sum is 37.

The square root of 3815965 is about 1953.4495130410. The cubic root of 3815965 is about 156.2673068829.

The spelling of 3815965 in words is "three million, eight hundred fifteen thousand, nine hundred sixty-five".