1312605224 has 128 divisors (see below), whose sum is σ = 3118694400. Its totient is φ = 504990720.

The previous prime is 1312605211. The next prime is 1312605247. The reversal of 1312605224 is 4225062131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312605193 and 1312605202.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2331167 + ... + 2331729.

It is an arithmetic number, because the mean of its divisors is an integer number (24364800).

Almost surely, 2^1312605224 is an apocalyptic number.

1312605224 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 1312605224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559347200).

1312605224 is an abundant number, since it is smaller than the sum of its proper divisors (1806089176).

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

1312605224 is a wasteful number, since it uses less digits than its factorization.

1312605224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1312605224 is about 36229.8940655365. The cubic root of 1312605224 is about 1094.9090432709.

Adding to 1312605224 its reverse (4225062131), we get a palindrome (5537667355).

The spelling of 1312605224 in words is "one billion, three hundred twelve million, six hundred five thousand, two hundred twenty-four".