1142336020 has 144 divisors (see below), whose sum is σ = 2880096912. Its totient is φ = 379330560.

The previous prime is 1142336017. The next prime is 1142336021. The reversal of 1142336020 is 206332411.

It can be written as a sum of positive squares in 8 ways, for example, as 6780816 + 1135555204 = 2604^2 + 33698^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1142335982 and 1142336000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142336021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5798562 + ... + 5798758.

It is an arithmetic number, because the mean of its divisors is an integer number (20000673).

Almost surely, 2^1142336020 is an apocalyptic number.

1142336020 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 1142336020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440048456).

1142336020 is an abundant number, since it is smaller than the sum of its proper divisors (1737760892).

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

1142336020 is a wasteful number, since it uses less digits than its factorization.

1142336020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1142336020 is about 33798.4617993186. The cubic root of 1142336020 is about 1045.3569806690.

Adding to 1142336020 its reverse (206332411), we get a palindrome (1348668431).

The spelling of 1142336020 in words is "one billion, one hundred forty-two million, three hundred thirty-six thousand, twenty".