1143422140 has 48 divisors (see below), whose sum is σ = 2768536512. Its totient is φ = 388555776.

The previous prime is 1143422123. The next prime is 1143422149. The reversal of 1143422140 is 412243411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143422149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20319 + ... + 51958.

It is an arithmetic number, because the mean of its divisors is an integer number (57677844).

Almost surely, 2^1143422140 is an apocalyptic number.

1143422140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143422140 is an abundant number, since it is smaller than the sum of its proper divisors (1625114372).

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

1143422140 is a wasteful number, since it uses less digits than its factorization.

1143422140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72406 (or 72404 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1143422140 is about 33814.5255770357. The cubic root of 1143422140 is about 1045.6881802044.

Adding to 1143422140 its reverse (412243411), we get a palindrome (1555665551).

The spelling of 1143422140 in words is "one billion, one hundred forty-three million, four hundred twenty-two thousand, one hundred forty".