9036421 has 2 divisors, whose sum is σ = 9036422. Its totient is φ = 9036420.

The previous prime is 9036373. The next prime is 9036463. The reversal of 9036421 is 1246309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8473921 + 562500 = 2911^2 + 750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9036421 is a prime.

9036421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9036481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4518210 + 4518211.

It is an arithmetic number, because the mean of its divisors is an integer number (4518211).

Almost surely, 2^9036421 is an apocalyptic number.

It is an amenable number.

9036421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9036421 is an equidigital number, since it uses as much as digits as its factorization.

9036421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 9036421 is about 3006.0640379074. The cubic root of 9036421 is about 208.2885925612.

The spelling of 9036421 in words is "nine million, thirty-six thousand, four hundred twenty-one".