1234321312 has 144 divisors (see below), whose sum is σ = 3082181760. Its totient is φ = 475656192.

The previous prime is 1234321273. The next prime is 1234321313. The reversal of 1234321312 is 2131234321.

It is not an unprimeable number, because it can be changed into a prime (1234321313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1488514 + ... + 1489342.

It is an arithmetic number, because the mean of its divisors is an integer number (21404040).

Almost surely, 2^1234321312 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 1234321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541090880).

1234321312 is an abundant number, since it is smaller than the sum of its proper divisors (1847860448).

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

1234321312 is a wasteful number, since it uses less digits than its factorization.

1234321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 878 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1234321312 is about 35132.9092447523. The cubic root of 1234321312 is about 1072.6945543528.

Adding to 1234321312 its reverse (2131234321), we get a palindrome (3365555633).

The spelling of 1234321312 in words is "one billion, two hundred thirty-four million, three hundred twenty-one thousand, three hundred twelve".