4121021 has 4 divisors (see below), whose sum is σ = 4363452. Its totient is φ = 3878592.

The previous prime is 4121017. The next prime is 4121063. The reversal of 4121021 is 1201214.

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 3189796 + 931225 = 1786^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 4121021 - 2² = 4121017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4120993 and 4121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121011) 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, 121190 + ... + 121223.

It is an arithmetic number, because the mean of its divisors is an integer number (1090863).

Almost surely, 2^4121021 is an apocalyptic number.

It is an amenable number.

4121021 is a deficient number, since it is larger than the sum of its proper divisors (242431).

4121021 is a wasteful number, since it uses less digits than its factorization.

4121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242430.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 4121021 is about 2030.0298027369. The cubic root of 4121021 is about 160.3251331261.

Adding to 4121021 its reverse (1201214), we get a palindrome (5322235).

The spelling of 4121021 in words is "four million, one hundred twenty-one thousand, twenty-one".