9221645 has 4 divisors (see below), whose sum is σ = 11065980. Its totient is φ = 7377312.

The previous prime is 9221617. The next prime is 9221647. The reversal of 9221645 is 5461229.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6405961 + 2815684 = 2531^2 + 1678^2 .

It is a cyclic number.

It is not a de Polignac number, because 9221645 - 2⁸ = 9221389 is a prime.

It is a super-3 number, since 3×9221645³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9221647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922160 + ... + 922169.

It is an arithmetic number, because the mean of its divisors is an integer number (2766495).

Almost surely, 2^9221645 is an apocalyptic number.

It is an amenable number.

9221645 is a deficient number, since it is larger than the sum of its proper divisors (1844335).

9221645 is a wasteful number, since it uses less digits than its factorization.

9221645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844334.

The product of its digits is 4320, while the sum is 29.

The square root of 9221645 is about 3036.7161540058. The cubic root of 9221645 is about 209.7021097590.

The spelling of 9221645 in words is "nine million, two hundred twenty-one thousand, six hundred forty-five".