9126421 has 2 divisors, whose sum is σ = 9126422. Its totient is φ = 9126420.

The previous prime is 9126407. The next prime is 9126473. The reversal of 9126421 is 1246219.

9126421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5225796 + 3900625 = 2286^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 9126421 - 2⁵ = 9126389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9126401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4563210 + 4563211.

It is an arithmetic number, because the mean of its divisors is an integer number (4563211).

Almost surely, 2^9126421 is an apocalyptic number.

It is an amenable number.

9126421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9126421 is an equidigital number, since it uses as much as digits as its factorization.

9126421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 9126421 is about 3020.9966898360. The cubic root of 9126421 is about 208.9778064542.

The spelling of 9126421 in words is "nine million, one hundred twenty-six thousand, four hundred twenty-one".