4168421 has 2 divisors, whose sum is σ = 4168422. Its totient is φ = 4168420.

The previous prime is 4168403. The next prime is 4168433. The reversal of 4168421 is 1248614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4056196 + 112225 = 2014^2 + 335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4168421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4168121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2084210 + 2084211.

It is an arithmetic number, because the mean of its divisors is an integer number (2084211).

Almost surely, 2^4168421 is an apocalyptic number.

It is an amenable number.

4168421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4168421 is an equidigital number, since it uses as much as digits as its factorization.

4168421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 4168421 is about 2041.6711292468. The cubic root of 4168421 is about 160.9374781349.

The spelling of 4168421 in words is "four million, one hundred sixty-eight thousand, four hundred twenty-one".