9252821 has 2 divisors, whose sum is σ = 9252822. Its totient is φ = 9252820.

The previous prime is 9252809. The next prime is 9252847. The reversal of 9252821 is 1282529.

9252821 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., 9060100 + 192721 = 3010^2 + 439^2 .

It is an emirp because it is prime and its reverse (1282529) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9252821 - 2²² = 5058517 is a prime.

It is a super-2 number, since 2×9252821² = 171229392916082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9252521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4626410 + 4626411.

It is an arithmetic number, because the mean of its divisors is an integer number (4626411).

Almost surely, 2^9252821 is an apocalyptic number.

It is an amenable number.

9252821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9252821 is an equidigital number, since it uses as much as digits as its factorization.

9252821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 9252821 is about 3041.8449993384. The cubic root of 9252821 is about 209.9381601739.

The spelling of 9252821 in words is "nine million, two hundred fifty-two thousand, eight hundred twenty-one".