1312453220 has 24 divisors (see below), whose sum is σ = 2968164024. Its totient is φ = 484598016.

The previous prime is 1312453217. The next prime is 1312453223. The reversal of 1312453220 is 223542131.

It is an interprime number because it is at equal distance from previous prime (1312453217) and next prime (1312453223).

It can be written as a sum of positive squares in 4 ways, for example, as 14868736 + 1297584484 = 3856^2 + 36022^2 .

It is not an unprimeable number, because it can be changed into a prime (1312453223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2523689 + ... + 2524208.

It is an arithmetic number, because the mean of its divisors is an integer number (123673501).

Almost surely, 2^1312453220 is an apocalyptic number.

1312453220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312453220 is an abundant number, since it is smaller than the sum of its proper divisors (1655710804).

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

1312453220 is a wasteful number, since it uses less digits than its factorization.

1312453220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047919 (or 5047917 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1312453220 is about 36227.7962343833. The cubic root of 1312453220 is about 1094.8667769504.

Adding to 1312453220 its reverse (223542131), we get a palindrome (1535995351).

The spelling of 1312453220 in words is "one billion, three hundred twelve million, four hundred fifty-three thousand, two hundred twenty".