2381865 has 8 divisors (see below), whose sum is σ = 3811008. Its totient is φ = 1270320.

The previous prime is 2381861. The next prime is 2381879. The reversal of 2381865 is 5681832.

It is a happy number.

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

It is not a de Polignac number, because 2381865 - 2² = 2381861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2381861) 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, 79381 + ... + 79410.

It is an arithmetic number, because the mean of its divisors is an integer number (476376).

2^2381865 is an apocalyptic number.

It is an amenable number.

2381865 is a deficient number, since it is larger than the sum of its proper divisors (1429143).

2381865 is a wasteful number, since it uses less digits than its factorization.

2381865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158799.

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

The square root of 2381865 is about 1543.3291936590. The cubic root of 2381865 is about 133.5485101940.

Subtracting from 2381865 its sum of digits (33), we obtain a palindrome (2381832).

The spelling of 2381865 in words is "two million, three hundred eighty-one thousand, eight hundred sixty-five".