4591121 has 2 divisors, whose sum is σ = 4591122. Its totient is φ = 4591120.

The previous prime is 4591117. The next prime is 4591127. The reversal of 4591121 is 1211954.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4494400 + 96721 = 2120^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4591121 - 2² = 4591117 is a prime.

It is a Chen prime.

It is equal to p₃₂₁₈₆₃ and since 4591121 and 321863 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (4591127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2295560 + 2295561.

It is an arithmetic number, because the mean of its divisors is an integer number (2295561).

Almost surely, 2^4591121 is an apocalyptic number.

It is an amenable number.

4591121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4591121 is an equidigital number, since it uses as much as digits as its factorization.

4591121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 23.

The square root of 4591121 is about 2142.6901315869. The cubic root of 4591121 is about 166.2032759193.

The spelling of 4591121 in words is "four million, five hundred ninety-one thousand, one hundred twenty-one".