12229009 has 9 divisors (see below), whose sum is σ = 13291473. Its totient is φ = 11246352.

The previous prime is 12229003. The next prime is 12229013. The reversal of 12229009 is 90092221.

The square root of 12229009 is 3497.

It is a perfect power (a square), and thus also a powerful number.

12229009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7700625 + 4528384 = 2775^2 + 2128^2 .

It is not a de Polignac number, because 12229009 - 2²¹ = 10131857 is a prime.

It is a super-2 number, since 2×12229009² = 299097322244162, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12229003) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45327 + ... + 45595.

Almost surely, 2^12229009 is an apocalyptic number.

12229009 is the 3497-th square number.

12229009 is the 1749-th centered octagonal number.

It is an amenable number.

12229009 is a deficient number, since it is larger than the sum of its proper divisors (1062464).

12229009 is an frugal number, since it uses more digits than its factorization.

12229009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The cubic root of 12229009 is about 230.3900690264.

Multiplying 12229009 by its sum of digits (25), we get a square (305725225 = 17485²).

The spelling of 12229009 in words is "twelve million, two hundred twenty-nine thousand, nine".