1312408120 has 16 divisors (see below), whose sum is σ = 2952918360. Its totient is φ = 524963232.

The previous prime is 1312408067. The next prime is 1312408121. The reversal of 1312408120 is 218042131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312408091 and 1312408100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312408121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16405062 + ... + 16405141.

Almost surely, 2^1312408120 is an apocalyptic number.

1312408120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312408120 is an abundant number, since it is smaller than the sum of its proper divisors (1640510240).

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

1312408120 is a wasteful number, since it uses less digits than its factorization.

1312408120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32810214 (or 32810210 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1312408120 is about 36227.1737788086. The cubic root of 1312408120 is about 1094.8542357905.

The spelling of 1312408120 in words is "one billion, three hundred twelve million, four hundred eight thousand, one hundred twenty".