1321141340 has 12 divisors (see below), whose sum is σ = 2774396856. Its totient is φ = 528456528.

The previous prime is 1321141333. The next prime is 1321141343. The reversal of 1321141340 is 431411231.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 66057067 = 1321141340 / (1 + 3 + 2 + 1 + 1 + 4 + 1 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321141343) 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, 33028514 + ... + 33028553.

It is an arithmetic number, because the mean of its divisors is an integer number (231199738).

Almost surely, 2^1321141340 is an apocalyptic number.

1321141340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321141340 is an abundant number, since it is smaller than the sum of its proper divisors (1453255516).

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

1321141340 is a wasteful number, since it uses less digits than its factorization.

1321141340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66057076 (or 66057074 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1321141340 is about 36347.5080301250. The cubic root of 1321141340 is about 1097.2773824930.

Adding to 1321141340 its reverse (431411231), we get a palindrome (1752552571).

The spelling of 1321141340 in words is "one billion, three hundred twenty-one million, one hundred forty-one thousand, three hundred forty".