1142203220 has 12 divisors (see below), whose sum is σ = 2398626804. Its totient is φ = 456881280.

The previous prime is 1142203219. The next prime is 1142203229. The reversal of 1142203220 is 223022411.

It can be written as a sum of positive squares in 2 ways, for example, as 531025936 + 611177284 = 23044^2 + 24722^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142203229) 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 3 ways as a sum of consecutive naturals, for example, 28555061 + ... + 28555100.

It is an arithmetic number, because the mean of its divisors is an integer number (199885567).

Almost surely, 2^1142203220 is an apocalyptic number.

1142203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142203220 is an abundant number, since it is smaller than the sum of its proper divisors (1256423584).

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

1142203220 is a wasteful number, since it uses less digits than its factorization.

1142203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57110170 (or 57110168 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1142203220 is about 33796.4971557704. The cubic root of 1142203220 is about 1045.3164704675.

Adding to 1142203220 its reverse (223022411), we get a palindrome (1365225631).

The spelling of 1142203220 in words is "one billion, one hundred forty-two million, two hundred three thousand, two hundred twenty".