12451212 has 48 divisors (see below), whose sum is σ = 33331200. Its totient is φ = 4015440.

The previous prime is 12451169. The next prime is 12451217. The reversal of 12451212 is 21215421.

12451212 is a `hidden beast` number, since 1 + 2 + 451 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12451217) 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, 1489 + ... + 5207.

It is an arithmetic number, because the mean of its divisors is an integer number (694400).

Almost surely, 2^12451212 is an apocalyptic number.

12451212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

12451212 is the 2232-nd heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12451212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16665600).

12451212 is an abundant number, since it is smaller than the sum of its proper divisors (20879988).

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

12451212 is a wasteful number, since it uses less digits than its factorization.

12451212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3763 (or 3755 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12451212 is about 3528.6274952168. The cubic root of 12451212 is about 231.7771095527. Note that the first 3 decimals are identical.

Adding to 12451212 its reverse (21215421), we get a palindrome (33666633).

The spelling of 12451212 in words is "twelve million, four hundred fifty-one thousand, two hundred twelve".