365021 has 2 divisors, whose sum is σ = 365022. Its totient is φ = 365020.

The previous prime is 365017. The next prime is 365039. The reversal of 365021 is 120563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 45796 = 565^2 + 214^2 .

It is an emirp because it is prime and its reverse (120563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 365021 - 2² = 365017 is a prime.

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 365021.

It is not a weakly prime, because it can be changed into another prime (367021) 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 as a sum of consecutive naturals, namely, 182510 + 182511.

It is an arithmetic number, because the mean of its divisors is an integer number (182511).

2³⁶⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

365021 is a deficient number, since it is larger than the sum of its proper divisors (1).

365021 is an equidigital number, since it uses as much as digits as its factorization.

365021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 365021 is about 604.1696781534. The cubic root of 365021 is about 71.4670655368.

Adding to 365021 its reverse (120563), we get a palindrome (485584).

The spelling of 365021 in words is "three hundred sixty-five thousand, twenty-one".