12315212 has 48 divisors (see below), whose sum is σ = 27697152. Its totient is φ = 4656960.

The previous prime is 12315209. The next prime is 12315223. The reversal of 12315212 is 21251321.

It is a happy number.

It is a super-3 number, since 3×12315212³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7637 + ... + 9107.

It is an arithmetic number, because the mean of its divisors is an integer number (577024).

Almost surely, 2^12315212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12315212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13848576).

12315212 is an abundant number, since it is smaller than the sum of its proper divisors (15381940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12315212 is a wasteful number, since it uses less digits than its factorization.

12315212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1516 counting only the distinct ones).

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

The square root of 12315212 is about 3509.3036346261. The cubic root of 12315212 is about 230.9301463542.

Adding to 12315212 its reverse (21251321), we get a palindrome (33566533).

The spelling of 12315212 in words is "twelve million, three hundred fifteen thousand, two hundred twelve".