2365881 has 16 divisors (see below), whose sum is σ = 3640704. Its totient is φ = 1338624.

The previous prime is 2365879. The next prime is 2365901. The reversal of 2365881 is 1885632.

It is a happy number.

It is not a de Polignac number, because 2365881 - 2¹ = 2365879 is a prime.

It is a super-2 number, since 2×2365881² = 11194785812322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2365381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (227544).

2^2365881 is an apocalyptic number.

2365881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2365881 is a deficient number, since it is larger than the sum of its proper divisors (1274823).

2365881 is a wasteful number, since it uses less digits than its factorization.

2365881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120.

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

The square root of 2365881 is about 1538.1420610594. The cubic root of 2365881 is about 133.2491044413.

Subtracting from 2365881 its reverse (1885632), we obtain a square (480249 = 693²).

The spelling of 2365881 in words is "two million, three hundred sixty-five thousand, eight hundred eighty-one".