4021541 has 8 divisors (see below), whose sum is σ = 4115904. Its totient is φ = 3928320.

The previous prime is 4021531. The next prime is 4021543. The reversal of 4021541 is 1451204.

4021541 = 29² + 30² + ... + 229².

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 4021541 - 2⁶ = 4021477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12776 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (514488).

Almost surely, 2^4021541 is an apocalyptic number.

It is an amenable number.

4021541 is a deficient number, since it is larger than the sum of its proper divisors (94363).

4021541 is a wasteful number, since it uses less digits than its factorization.

4021541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 4021541 is about 2005.3780192273. The cubic root of 4021541 is about 159.0245469268.

Adding to 4021541 its reverse (1451204), we get a palindrome (5472745).

The spelling of 4021541 in words is "four million, twenty-one thousand, five hundred forty-one".