366021 has 12 divisors (see below), whose sum is σ = 537472. Its totient is φ = 239976.

The previous prime is 366019. The next prime is 366029. The reversal of 366021 is 120663.

It is a happy number.

366021 is a `hidden beast` number, since 3 + 660 + 2 + 1 = 666.

It is not a de Polignac number, because 366021 - 2¹ = 366019 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 365985 and 366003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300 + ... + 906.

2³⁶⁶⁰²¹ is an apocalyptic number.

It is an amenable number.

366021 is a deficient number, since it is larger than the sum of its proper divisors (171451).

366021 is a wasteful number, since it uses less digits than its factorization.

366021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 366021 is about 604.9966942058. The cubic root of 366021 is about 71.5322690016.

Adding to 366021 its reverse (120663), we get a palindrome (486684).

The spelling of 366021 in words is "three hundred sixty-six thousand, twenty-one".