367821 has 20 divisors (see below), whose sum is σ = 580800. Its totient is φ = 231336.

The previous prime is 367819. The next prime is 367823. The reversal of 367821 is 128763.

It is an interprime number because it is at equal distance from previous prime (367819) and next prime (367823).

It is not a de Polignac number, because 367821 - 2¹ = 367819 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 367821.

It is not an unprimeable number, because it can be changed into a prime (367823) 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 19 ways as a sum of consecutive naturals, for example, 1420 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (29040).

2³⁶⁷⁸²¹ is an apocalyptic number.

It is an amenable number.

367821 is a deficient number, since it is larger than the sum of its proper divisors (212979).

367821 is a wasteful number, since it uses less digits than its factorization.

367821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 261 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 367821 is about 606.4824811979. The cubic root of 367821 is about 71.6493365945.

The spelling of 367821 in words is "three hundred sixty-seven thousand, eight hundred twenty-one".