1323042140 has 72 divisors (see below), whose sum is σ = 3252967200. Its totient is φ = 450672768.

The previous prime is 1323042131. The next prime is 1323042223. The reversal of 1323042140 is 412403231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149561 + ... + 158159.

It is an arithmetic number, because the mean of its divisors is an integer number (45180100).

Almost surely, 2^1323042140 is an apocalyptic number.

1323042140 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 1323042140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626483600).

1323042140 is an abundant number, since it is smaller than the sum of its proper divisors (1929925060).

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

1323042140 is a wasteful number, since it uses less digits than its factorization.

1323042140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8779 (or 8770 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1323042140 is about 36373.6462291038. The cubic root of 1323042140 is about 1097.8033684495.

Adding to 1323042140 its reverse (412403231), we get a palindrome (1735445371).

The spelling of 1323042140 in words is "one billion, three hundred twenty-three million, forty-two thousand, one hundred forty".