4011865 has 32 divisors (see below), whose sum is σ = 5870592. Its totient is φ = 2592000.

The previous prime is 4011863. The next prime is 4011871. The reversal of 4011865 is 5681104.

4011865 = T₂₄₆ + T₂₄₇ + ... + T₃₃₈.

It is not a de Polignac number, because 4011865 - 2¹ = 4011863 is a prime.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22075 + ... + 22255.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

Almost surely, 2^4011865 is an apocalyptic number.

It is an amenable number.

4011865 is a deficient number, since it is larger than the sum of its proper divisors (1858727).

4011865 is a wasteful number, since it uses less digits than its factorization.

4011865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 4011865 is about 2002.9640535966. The cubic root of 4011865 is about 158.8969045425.

Adding to 4011865 its reverse (5681104), we get a palindrome (9692969).

The spelling of 4011865 in words is "four million, eleven thousand, eight hundred sixty-five".