1321340412 has 96 divisors (see below), whose sum is σ = 3612672000. Its totient is φ = 368102592.

The previous prime is 1321340407. The next prime is 1321340467. The reversal of 1321340412 is 2140431231.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 549589 + ... + 551987.

It is an arithmetic number, because the mean of its divisors is an integer number (37632000).

Almost surely, 2^1321340412 is an apocalyptic number.

1321340412 is a gapful number since it is divisible by the number (12) 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 1321340412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1806336000).

1321340412 is an abundant number, since it is smaller than the sum of its proper divisors (2291331588).

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

1321340412 is a wasteful number, since it uses less digits than its factorization.

1321340412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575 (or 2573 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1321340412 is about 36350.2463815584. The cubic root of 1321340412 is about 1097.3324929812.

Adding to 1321340412 its reverse (2140431231), we get a palindrome (3461771643).

The spelling of 1321340412 in words is "one billion, three hundred twenty-one million, three hundred forty thousand, four hundred twelve".