1312411356 has 144 divisors (see below), whose sum is σ = 3750818400. Its totient is φ = 395006976.

The previous prime is 1312411333. The next prime is 1312411361. The reversal of 1312411356 is 6531142131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8359230 + ... + 8359386.

It is an arithmetic number, because the mean of its divisors is an integer number (26047350).

Almost surely, 2^1312411356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312411356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875409200).

1312411356 is an abundant number, since it is smaller than the sum of its proper divisors (2438407044).

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

1312411356 is a wasteful number, since it uses less digits than its factorization.

1312411356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 208 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1312411356 is about 36227.2184413874. The cubic root of 1312411356 is about 1094.8551356491.

Adding to 1312411356 its reverse (6531142131), we get a palindrome (7843553487).

The spelling of 1312411356 in words is "one billion, three hundred twelve million, four hundred eleven thousand, three hundred fifty-six".