4201021 has 4 divisors (see below), whose sum is σ = 4582944. Its totient is φ = 3819100.

The previous prime is 4201013. The next prime is 4201051. The reversal of 4201021 is 1201024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4201021 - 2³ = 4201013 is a prime.

It is a super-3 number, since 3×4201021³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4200989 and 4201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4201051) 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, 190945 + ... + 190966.

It is an arithmetic number, because the mean of its divisors is an integer number (1145736).

Almost surely, 2^4201021 is an apocalyptic number.

It is an amenable number.

4201021 is a deficient number, since it is larger than the sum of its proper divisors (381923).

4201021 is a wasteful number, since it uses less digits than its factorization.

4201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381922.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 4201021 is about 2049.6392365487. The cubic root of 4201021 is about 161.3559374372.

Adding to 4201021 its reverse (1201024), we get a palindrome (5402045).

It can be divided in two parts, 420 and 1021, that added together give a palindrome (1441).

The spelling of 4201021 in words is "four million, two hundred one thousand, twenty-one".