12213125 has 10 divisors (see below), whose sum is σ = 15262302. Its totient is φ = 9770000.

The previous prime is 12213109. The next prime is 12213127. The reversal of 12213125 is 52131221.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 6385729 + 5827396 = 2527^2 + 2414^2 .

It is not a de Polignac number, because 12213125 - 2⁴ = 12213109 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 (12213127) 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 9 ways as a sum of consecutive naturals, for example, 9146 + ... + 10395.

Almost surely, 2^12213125 is an apocalyptic number.

It is an amenable number.

12213125 is a deficient number, since it is larger than the sum of its proper divisors (3049177).

12213125 is an frugal number, since it uses more digits than its factorization.

12213125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19561 (or 19546 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 12213125 is about 3494.7281725479. The cubic root of 12213125 is about 230.2902762189.

Adding to 12213125 its reverse (52131221), we get a palindrome (64344346).

The spelling of 12213125 in words is "twelve million, two hundred thirteen thousand, one hundred twenty-five".