4160021 has 8 divisors (see below), whose sum is σ = 4420920. Its totient is φ = 3907008.

The previous prime is 4160011. The next prime is 4160027. The reversal of 4160021 is 1200614.

It can be written as a sum of positive squares in 4 ways, for example, as 970225 + 3189796 = 985^2 + 1786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4160021 - 2¹⁴ = 4143637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4159978 and 4160005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4160027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (552615).

Almost surely, 2^4160021 is an apocalyptic number.

It is an amenable number.

4160021 is a deficient number, since it is larger than the sum of its proper divisors (260899).

4160021 is a wasteful number, since it uses less digits than its factorization.

4160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 4160021 is about 2039.6129534792. The cubic root of 4160021 is about 160.8293009689.

Adding to 4160021 its reverse (1200614), we get a palindrome (5360635).

The spelling of 4160021 in words is "four million, one hundred sixty thousand, twenty-one".