1320005142 has 24 divisors (see below), whose sum is σ = 2926524744. Its totient is φ = 429768864.

The previous prime is 1320005131. The next prime is 1320005143. The reversal of 1320005142 is 2415000231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320005143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851943 + ... + 853490.

It is an arithmetic number, because the mean of its divisors is an integer number (121938531).

Almost surely, 2^1320005142 is an apocalyptic number.

1320005142 is an abundant number, since it is smaller than the sum of its proper divisors (1606519602).

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

1320005142 is a wasteful number, since it uses less digits than its factorization.

1320005142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705484 (or 1705481 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1320005142 is about 36331.8750135470. The cubic root of 1320005142 is about 1096.9627348723.

Adding to 1320005142 its reverse (2415000231), we get a palindrome (3735005373).

The spelling of 1320005142 in words is "one billion, three hundred twenty million, five thousand, one hundred forty-two".