4170121 has 2 divisors, whose sum is σ = 4170122. Its totient is φ = 4170120.

The previous prime is 4170119. The next prime is 4170191. The reversal of 4170121 is 1210714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 190096 = 1995^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 4170121 - 2¹ = 4170119 is a prime.

Together with 4170119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4170095 and 4170104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4170191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085060 + 2085061.

It is an arithmetic number, because the mean of its divisors is an integer number (2085061).

Almost surely, 2^4170121 is an apocalyptic number.

It is an amenable number.

4170121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4170121 is an equidigital number, since it uses as much as digits as its factorization.

4170121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 4170121 is about 2042.0874124288. The cubic root of 4170121 is about 160.9593534468.

Adding to 4170121 its reverse (1210714), we get a palindrome (5380835).

The spelling of 4170121 in words is "four million, one hundred seventy thousand, one hundred twenty-one".