4123865 has 4 divisors (see below), whose sum is σ = 4948644. Its totient is φ = 3299088.

The previous prime is 4123849. The next prime is 4123871. The reversal of 4123865 is 5683214.

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 2729104 + 1394761 = 1652^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 4123865 - 2⁴ = 4123849 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 1 + 2⁵ + 3⁵ + 8⁷ + 6⁵ + 5⁹ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412382 + ... + 412391.

It is an arithmetic number, because the mean of its divisors is an integer number (1237161).

Almost surely, 2^4123865 is an apocalyptic number.

It is an amenable number.

4123865 is a deficient number, since it is larger than the sum of its proper divisors (824779).

4123865 is an equidigital number, since it uses as much as digits as its factorization.

4123865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824778.

The product of its digits is 5760, while the sum is 29.

The square root of 4123865 is about 2030.7301642513. The cubic root of 4123865 is about 160.3620058516.

The spelling of 4123865 in words is "four million, one hundred twenty-three thousand, eight hundred sixty-five".