4123121 has 2 divisors, whose sum is σ = 4123122. Its totient is φ = 4123120.

The previous prime is 4123111. The next prime is 4123127. The reversal of 4123121 is 1213214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2446096 + 1677025 = 1564^2 + 1295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4123121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4123096 and 4123105.

It is not a weakly prime, because it can be changed into another prime (4123127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2061560 + 2061561.

It is an arithmetic number, because the mean of its divisors is an integer number (2061561).

Almost surely, 2^4123121 is an apocalyptic number.

It is an amenable number.

4123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4123121 is an equidigital number, since it uses as much as digits as its factorization.

4123121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 14.

The square root of 4123121 is about 2030.5469706461. The cubic root of 4123121 is about 160.3523614599.

Adding to 4123121 its reverse (1213214), we get a palindrome (5336335).

The spelling of 4123121 in words is "four million, one hundred twenty-three thousand, one hundred twenty-one".