4030121 has 2 divisors, whose sum is σ = 4030122. Its totient is φ = 4030120.

The previous prime is 4030069. The next prime is 4030123. The reversal of 4030121 is 1210304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3759721 + 270400 = 1939^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 4030121 - 2¹⁰ = 4029097 is a prime.

Together with 4030123, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4030123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015060 + 2015061.

It is an arithmetic number, because the mean of its divisors is an integer number (2015061).

Almost surely, 2^4030121 is an apocalyptic number.

It is an amenable number.

4030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4030121 is an equidigital number, since it uses as much as digits as its factorization.

4030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4030121 is about 2007.5161269589. The cubic root of 4030121 is about 159.1375601075.

Adding to 4030121 its reverse (1210304), we get a palindrome (5240425).

The spelling of 4030121 in words is "four million, thirty thousand, one hundred twenty-one".