1312335420 has 96 divisors (see below), whose sum is σ = 4048482816. Its totient is φ = 314976000.

The previous prime is 1312335391. The next prime is 1312335433. The reversal of 1312335420 is 245332131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56817 + ... + 76503.

It is an arithmetic number, because the mean of its divisors is an integer number (42171696).

Almost surely, 2^1312335420 is an apocalyptic number.

1312335420 is a gapful number since it is divisible by the number (10) 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 1312335420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2024241408).

1312335420 is an abundant number, since it is smaller than the sum of its proper divisors (2736147396).

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

1312335420 is a wasteful number, since it uses less digits than its factorization.

1312335420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19811 (or 19809 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1312335420 is about 36226.1703744682. The cubic root of 1312335420 is about 1094.8340191695.

Adding to 1312335420 its reverse (245332131), we get a palindrome (1557667551).

The spelling of 1312335420 in words is "one billion, three hundred twelve million, three hundred thirty-five thousand, four hundred twenty".