4555121 has 2 divisors, whose sum is σ = 4555122. Its totient is φ = 4555120.

The previous prime is 4555091. The next prime is 4555139. The reversal of 4555121 is 1215554.

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., 4080400 + 474721 = 2020^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 4555121 - 2¹⁰ = 4554097 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4555151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2277560 + 2277561.

It is an arithmetic number, because the mean of its divisors is an integer number (2277561).

Almost surely, 2^4555121 is an apocalyptic number.

It is an amenable number.

4555121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4555121 is an equidigital number, since it uses as much as digits as its factorization.

4555121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000, while the sum is 23.

The square root of 4555121 is about 2134.2729441194. The cubic root of 4555121 is about 165.7677232326.

It can be divided in two parts, 4555 and 121, that multiplied together give a palindrome (551155).

The spelling of 4555121 in words is "four million, five hundred fifty-five thousand, one hundred twenty-one".