4140121 has 2 divisors, whose sum is σ = 4140122. Its totient is φ = 4140120.

The previous prime is 4140113. The next prime is 4140133. The reversal of 4140121 is 1210414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 318096 = 1955^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140121 - 2³ = 4140113 is a prime.

4140121 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4140421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2070060 + 2070061.

It is an arithmetic number, because the mean of its divisors is an integer number (2070061).

Almost surely, 2^4140121 is an apocalyptic number.

It is an amenable number.

4140121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4140121 is an equidigital number, since it uses as much as digits as its factorization.

4140121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 4140121 is about 2034.7287288481. The cubic root of 4140121 is about 160.5724416857.

Adding to 4140121 its reverse (1210414), we get a palindrome (5350535).

The spelling of 4140121 in words is "four million, one hundred forty thousand, one hundred twenty-one".