1212456432 has 80 divisors (see below), whose sum is σ = 3426780672. Its totient is φ = 366351360.

The previous prime is 1212456409. The next prime is 1212456433. The reversal of 1212456432 is 2346542121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212456432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212456433) 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 15 ways as a sum of consecutive naturals, for example, 190648 + ... + 196904.

Almost surely, 2^1212456432 is an apocalyptic number.

1212456432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212456432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1713390336).

1212456432 is an abundant number, since it is smaller than the sum of its proper divisors (2214324240).

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

1212456432 is a wasteful number, since it uses less digits than its factorization.

1212456432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646 (or 6640 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 1212456432 is about 34820.3450873193. The cubic root of 1212456432 is about 1066.3228456109.

Adding to 1212456432 its reverse (2346542121), we get a palindrome (3558998553).

The spelling of 1212456432 in words is "one billion, two hundred twelve million, four hundred fifty-six thousand, four hundred thirty-two".