1323142120 has 64 divisors (see below), whose sum is σ = 3070379520. Its totient is φ = 512891904.

The previous prime is 1323142111. The next prime is 1323142133. The reversal of 1323142120 is 212413231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190224 + ... + 197056.

It is an arithmetic number, because the mean of its divisors is an integer number (47974680).

Almost surely, 2^1323142120 is an apocalyptic number.

1323142120 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 1323142120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535189760).

1323142120 is an abundant number, since it is smaller than the sum of its proper divisors (1747237400).

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

1323142120 is a wasteful number, since it uses less digits than its factorization.

1323142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1323142120 is about 36375.0205498224. The cubic root of 1323142120 is about 1097.8310207852.

Adding to 1323142120 its reverse (212413231), we get a palindrome (1535555351).

The spelling of 1323142120 in words is "one billion, three hundred twenty-three million, one hundred forty-two thousand, one hundred twenty".