12204505 has 16 divisors (see below), whose sum is σ = 15371280. Its totient is φ = 9289728.

The previous prime is 12204503. The next prime is 12204523. The reversal of 12204505 is 50540221.

It can be written as a sum of positive squares in 8 ways, for example, as 205209 + 11999296 = 453^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 12204505 - 2¹ = 12204503 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12204503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10009 + ... + 11161.

It is an arithmetic number, because the mean of its divisors is an integer number (960705).

Almost surely, 2^12204505 is an apocalyptic number.

It is an amenable number.

12204505 is a deficient number, since it is larger than the sum of its proper divisors (3166775).

12204505 is a wasteful number, since it uses less digits than its factorization.

12204505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 12204505 is about 3493.4946686663. The cubic root of 12204505 is about 230.2360839902.

Adding to 12204505 its reverse (50540221), we get a palindrome (62744726).

The spelling of 12204505 in words is "twelve million, two hundred four thousand, five hundred five".