3812865 has 16 divisors (see below), whose sum is σ = 6972288. Its totient is φ = 1742976.

The previous prime is 3812843. The next prime is 3812899. The reversal of 3812865 is 5682183.

It is a happy number.

It is not a de Polignac number, because 3812865 - 2⁶ = 3812801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18052 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (435768).

Almost surely, 2^3812865 is an apocalyptic number.

3812865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3812865 is a deficient number, since it is larger than the sum of its proper divisors (3159423).

3812865 is a wasteful number, since it uses less digits than its factorization.

3812865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36328.

The product of its digits is 11520, while the sum is 33.

The square root of 3812865 is about 1952.6558836620. The cubic root of 3812865 is about 156.2249794603.

The spelling of 3812865 in words is "three million, eight hundred twelve thousand, eight hundred sixty-five".