4360021 has 4 divisors (see below), whose sum is σ = 4409100. Its totient is φ = 4310944.

The previous prime is 4360019. The next prime is 4360033. The reversal of 4360021 is 1200634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1200634 = 2 ⋅600317.

It can be written as a sum of positive squares in 2 ways, for example, as 239121 + 4120900 = 489^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 4360021 - 2¹ = 4360019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4359977 and 4360004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4360001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24406 + ... + 24583.

It is an arithmetic number, because the mean of its divisors is an integer number (1102275).

Almost surely, 2^4360021 is an apocalyptic number.

It is an amenable number.

4360021 is a deficient number, since it is larger than the sum of its proper divisors (49079).

4360021 is an equidigital number, since it uses as much as digits as its factorization.

4360021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49078.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 4360021 is about 2088.0663303641. The cubic root of 4360021 is about 163.3664456908.

Adding to 4360021 its reverse (1200634), we get a palindrome (5560655).

The spelling of 4360021 in words is "four million, three hundred sixty thousand, twenty-one".