4003121 has 2 divisors, whose sum is σ = 4003122. Its totient is φ = 4003120.

The previous prime is 4003099. The next prime is 4003133. The reversal of 4003121 is 1213004.

It is a happy number.

4003121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 255025 = 1936^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 4003121 - 2⁶ = 4003057 is a prime.

It is not a weakly prime, because it can be changed into another prime (4003151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001560 + 2001561.

It is an arithmetic number, because the mean of its divisors is an integer number (2001561).

Almost surely, 2^4003121 is an apocalyptic number.

It is an amenable number.

4003121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4003121 is an equidigital number, since it uses as much as digits as its factorization.

4003121 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 4003121 is about 2000.7800978618. The cubic root of 4003121 is about 158.7813801195.

Adding to 4003121 its reverse (1213004), we get a palindrome (5216125).

The spelling of 4003121 in words is "four million, three thousand, one hundred twenty-one".