9021641 has 2 divisors, whose sum is σ = 9021642. Its totient is φ = 9021640.

The previous prime is 9021619. The next prime is 9021647. The reversal of 9021641 is 1461209.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 2468041 = 2560^2 + 1571^2 .

It is an emirp because it is prime and its reverse (1461209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9021641 - 2¹⁰ = 9020617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9021647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510820 + 4510821.

It is an arithmetic number, because the mean of its divisors is an integer number (4510821).

Almost surely, 2^9021641 is an apocalyptic number.

It is an amenable number.

9021641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9021641 is an equidigital number, since it uses as much as digits as its factorization.

9021641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 9021641 is about 3003.6046677284. The cubic root of 9021641 is about 208.1749714226.

Subtracting from 9021641 its product of nonzero digits (432), we obtain a palindrome (9021209).

The spelling of 9021641 in words is "nine million, twenty-one thousand, six hundred forty-one".