4291121 has 2 divisors, whose sum is σ = 4291122. Its totient is φ = 4291120.

The previous prime is 4291117. The next prime is 4291141. The reversal of 4291121 is 1211924.

It is an a-pointer prime, because the next prime (4291141) can be obtained adding 4291121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 26896 = 2065^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 4291121 - 2² = 4291117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4291093 and 4291102.

It is not a weakly prime, because it can be changed into another prime (4291141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2145560 + 2145561.

It is an arithmetic number, because the mean of its divisors is an integer number (2145561).

Almost surely, 2^4291121 is an apocalyptic number.

It is an amenable number.

4291121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4291121 is an equidigital number, since it uses as much as digits as its factorization.

4291121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 4291121 is about 2071.5021119951. The cubic root of 4291121 is about 162.5013301666.

The spelling of 4291121 in words is "four million, two hundred ninety-one thousand, one hundred twenty-one".