1312276224 has 144 divisors (see below), whose sum is σ = 4165443072. Its totient is φ = 358600704.

The previous prime is 1312276219. The next prime is 1312276241. The reversal of 1312276224 is 4226722131.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1312276191 and 1312276200.

It is a congruent number.

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, 118342 + ... + 128954.

It is an arithmetic number, because the mean of its divisors is an integer number (28926688).

Almost surely, 2^1312276224 is an apocalyptic number.

1312276224 is a gapful number since it is divisible by the number (14) 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 1312276224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082721536).

1312276224 is an abundant number, since it is smaller than the sum of its proper divisors (2853166848).

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

1312276224 is a wasteful number, since it uses less digits than its factorization.

1312276224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10662 (or 10648 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 1312276224 is about 36225.3533316102. The cubic root of 1312276224 is about 1094.8175572274.

Adding to 1312276224 its reverse (4226722131), we get a palindrome (5538998355).

The spelling of 1312276224 in words is "one billion, three hundred twelve million, two hundred seventy-six thousand, two hundred twenty-four".