12251213 has 4 divisors (see below), whose sum is σ = 13193628. Its totient is φ = 11308800.

The previous prime is 12251207. The next prime is 12251269. The reversal of 12251213 is 31215221.

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 3736489 + 8514724 = 1933^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 12251213 - 2⁶ = 12251149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12251191 and 12251200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12254213) 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 3 ways as a sum of consecutive naturals, for example, 471188 + ... + 471213.

It is an arithmetic number, because the mean of its divisors is an integer number (3298407).

Almost surely, 2^12251213 is an apocalyptic number.

12251213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12251213 is a deficient number, since it is larger than the sum of its proper divisors (942415).

12251213 is an equidigital number, since it uses as much as digits as its factorization.

12251213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942414.

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

The square root of 12251213 is about 3500.1732814248. The cubic root of 12251213 is about 230.5294231399.

Adding to 12251213 its reverse (31215221), we get a palindrome (43466434).

The spelling of 12251213 in words is "twelve million, two hundred fifty-one thousand, two hundred thirteen".