1143322420 has 24 divisors (see below), whose sum is σ = 2542211784. Its totient is φ = 430427136.

The previous prime is 1143322409. The next prime is 1143322429. The reversal of 1143322420 is 242233411.

It can be written as a sum of positive squares in 4 ways, for example, as 231161616 + 912160804 = 15204^2 + 30202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1143322391 and 1143322400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143322429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681017 + ... + 1681696.

It is an arithmetic number, because the mean of its divisors is an integer number (105925491).

Almost surely, 2^1143322420 is an apocalyptic number.

1143322420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143322420 is an abundant number, since it is smaller than the sum of its proper divisors (1398889364).

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

1143322420 is a wasteful number, since it uses less digits than its factorization.

1143322420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362739 (or 3362737 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1143322420 is about 33813.0510306302. The cubic root of 1143322420 is about 1045.6577805083.

Adding to 1143322420 its reverse (242233411), we get a palindrome (1385555831).

The spelling of 1143322420 in words is "one billion, one hundred forty-three million, three hundred twenty-two thousand, four hundred twenty".