2263865 has 4 divisors (see below), whose sum is σ = 2716644. Its totient is φ = 1811088.

The previous prime is 2263861. The next prime is 2263879. The reversal of 2263865 is 5683622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 753424 + 1510441 = 868^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 2263865 - 2² = 2263861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2263861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226382 + ... + 226391.

It is an arithmetic number, because the mean of its divisors is an integer number (679161).

2^2263865 is an apocalyptic number.

It is an amenable number.

2263865 is a deficient number, since it is larger than the sum of its proper divisors (452779).

2263865 is an equidigital number, since it uses as much as digits as its factorization.

2263865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452778.

The product of its digits is 17280, while the sum is 32.

The square root of 2263865 is about 1504.6145685856. The cubic root of 2263865 is about 131.3056785688.

It can be divided in two parts, 22638 and 65, that multiplied together give a triangular number (1471470 = T₁₇₁₅).

The spelling of 2263865 in words is "two million, two hundred sixty-three thousand, eight hundred sixty-five".