2365821 has 8 divisors (see below), whose sum is σ = 3504960. Its totient is φ = 1577196.

The previous prime is 2365789. The next prime is 2365829. The reversal of 2365821 is 1285632.

2365821 is a `hidden beast` number, since 2 + 3 + 658 + 2 + 1 = 666.

2365821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2365821 - 2⁵ = 2365789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 87623 = 2365821 / (2 + 3 + 6 + 5 + 8 + 2 + 1).

It is a d-powerful number, because it can be written as 2¹⁸ + 3⁷ + 6³ + 5² + 8⁴ + 2²¹ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2365829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43785 + ... + 43838.

It is an arithmetic number, because the mean of its divisors is an integer number (438120).

2^2365821 is an apocalyptic number.

It is an amenable number.

2365821 is a deficient number, since it is larger than the sum of its proper divisors (1139139).

2365821 is an equidigital number, since it uses as much as digits as its factorization.

2365821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87632 (or 87626 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2365821 is about 1538.1225568855. The cubic root of 2365821 is about 133.2479780091.

The spelling of 2365821 in words is "two million, three hundred sixty-five thousand, eight hundred twenty-one".