4045121 has 2 divisors, whose sum is σ = 4045122. Its totient is φ = 4045120.

The previous prime is 4045117. The next prime is 4045127. The reversal of 4045121 is 1215404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 297025 = 1936^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045121 - 2² = 4045117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4045121.

It is not a weakly prime, because it can be changed into another prime (4045127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022560 + 2022561.

It is an arithmetic number, because the mean of its divisors is an integer number (2022561).

Almost surely, 2^4045121 is an apocalyptic number.

It is an amenable number.

4045121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4045121 is an equidigital number, since it uses as much as digits as its factorization.

4045121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 4045121 is about 2011.2486171530. The cubic root of 4045121 is about 159.3347508768.

The spelling of 4045121 in words is "four million, forty-five thousand, one hundred twenty-one".