4122021 has 4 divisors (see below), whose sum is σ = 5496032. Its totient is φ = 2748012.

The previous prime is 4121987. The next prime is 4122043. The reversal of 4122021 is 1202214.

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 not a de Polignac number, because 4122021 - 2⁷ = 4121893 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4121988 and 4122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122121) 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, 687001 + ... + 687006.

It is an arithmetic number, because the mean of its divisors is an integer number (1374008).

Almost surely, 2^4122021 is an apocalyptic number.

It is an amenable number.

4122021 is a deficient number, since it is larger than the sum of its proper divisors (1374011).

4122021 is a wasteful number, since it uses less digits than its factorization.

4122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4122021 is about 2030.2760895996. The cubic root of 4122021 is about 160.3381001527.

Adding to 4122021 its reverse (1202214), we get a palindrome (5324235).

The spelling of 4122021 in words is "four million, one hundred twenty-two thousand, twenty-one".