4171421 has 2 divisors, whose sum is σ = 4171422. Its totient is φ = 4171420.

The previous prime is 4171411. The next prime is 4171423. The reversal of 4171421 is 1241714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3880900 + 290521 = 1970^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 4171421 - 2⁶ = 4171357 is a prime.

Together with 4171423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4171393 and 4171402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4171423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085710 + 2085711.

It is an arithmetic number, because the mean of its divisors is an integer number (2085711).

Almost surely, 2^4171421 is an apocalyptic number.

It is an amenable number.

4171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4171421 is an equidigital number, since it uses as much as digits as its factorization.

4171421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 20.

The square root of 4171421 is about 2042.4056893771. The cubic root of 4171421 is about 160.9760776153.

The spelling of 4171421 in words is "four million, one hundred seventy-one thousand, four hundred twenty-one".