10445221 has 6 divisors (see below), whose sum is σ = 10536050. Its totient is φ = 10355088.

The previous prime is 10445219. The next prime is 10445257. The reversal of 10445221 is 12254401.

It can be written as a sum of positive squares in 3 ways, for example, as 7344100 + 3101121 = 2710^2 + 1761^2 .

It is not a de Polignac number, because 10445221 - 2¹ = 10445219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10445261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29755 + ... + 30103.

It is a 115-hyperperfect number.

Almost surely, 2^10445221 is an apocalyptic number.

It is an amenable number.

10445221 is a deficient number, since it is larger than the sum of its proper divisors (90829).

10445221 is an frugal number, since it uses more digits than its factorization.

10445221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 10445221 is about 3231.9067127626. The cubic root of 10445221 is about 218.5944901814.

Adding to 10445221 its reverse (12254401), we get a palindrome (22699622).

The spelling of 10445221 in words is "ten million, four hundred forty-five thousand, two hundred twenty-one".