1142263220 has 48 divisors (see below), whose sum is σ = 2745418368. Its totient is φ = 391063680.

The previous prime is 1142263217. The next prime is 1142263229. The reversal of 1142263220 is 223622411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142263229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97055 + ... + 108185.

It is an arithmetic number, because the mean of its divisors is an integer number (57196216).

Almost surely, 2^1142263220 is an apocalyptic number.

1142263220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142263220 is an abundant number, since it is smaller than the sum of its proper divisors (1603155148).

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

1142263220 is a wasteful number, since it uses less digits than its factorization.

1142263220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11880 (or 11878 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1142263220 is about 33797.3848100707. The cubic root of 1142263220 is about 1045.3347736582.

Adding to 1142263220 its reverse (223622411), we get a palindrome (1365885631).

The spelling of 1142263220 in words is "one billion, one hundred forty-two million, two hundred sixty-three thousand, two hundred twenty".