1212504216 has 144 divisors (see below), whose sum is σ = 3876316920. Its totient is φ = 314899200.

The previous prime is 1212504211. The next prime is 1212504233. The reversal of 1212504216 is 6124052121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212504211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 138036 + ... + 146556.

Almost surely, 2^1212504216 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 1212504216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1938158460).

1212504216 is an abundant number, since it is smaller than the sum of its proper divisors (2663812704).

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

1212504216 is a wasteful number, since it uses less digits than its factorization.

1212504216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566 (or 8544 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1212504216 is about 34821.0312311396. The cubic root of 1212504216 is about 1066.3368536748.

Adding to 1212504216 its reverse (6124052121), we get a palindrome (7336556337).

The spelling of 1212504216 in words is "one billion, two hundred twelve million, five hundred four thousand, two hundred sixteen".