4054021 has 4 divisors (see below), whose sum is σ = 4063500. Its totient is φ = 4044544.

The previous prime is 4054019. The next prime is 4054031. The reversal of 4054021 is 1204504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3556996 + 497025 = 1886^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 4054021 - 2¹ = 4054019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4053986 and 4054004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4054031) 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, 4066 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (1015875).

Almost surely, 2^4054021 is an apocalyptic number.

It is an amenable number.

4054021 is a deficient number, since it is larger than the sum of its proper divisors (9479).

4054021 is an equidigital number, since it uses as much as digits as its factorization.

4054021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4054021 is about 2013.4599573868. The cubic root of 4054021 is about 159.4515203992.

Adding to 4054021 its reverse (1204504), we get a palindrome (5258525).

The spelling of 4054021 in words is "four million, fifty-four thousand, twenty-one".