8410421 has 2 divisors, whose sum is σ = 8410422. Its totient is φ = 8410420.

The previous prime is 8410399. The next prime is 8410429. The reversal of 8410421 is 1240148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 1060900 = 2711^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 8410421 - 2¹⁴ = 8394037 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8410393 and 8410402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8410429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4205210 + 4205211.

It is an arithmetic number, because the mean of its divisors is an integer number (4205211).

Almost surely, 2^8410421 is an apocalyptic number.

It is an amenable number.

8410421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8410421 is an equidigital number, since it uses as much as digits as its factorization.

8410421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 8410421 is about 2900.0725852985. The cubic root of 8410421 is about 203.3632990564.

Adding to 8410421 its reverse (1240148), we get a palindrome (9650569).

The spelling of 8410421 in words is "eight million, four hundred ten thousand, four hundred twenty-one".