1142355220 has 12 divisors (see below), whose sum is σ = 2398946004. Its totient is φ = 456942080.

The previous prime is 1142355209. The next prime is 1142355223. The reversal of 1142355220 is 225532411.

It can be written as a sum of positive squares in 2 ways, for example, as 144048004 + 998307216 = 12002^2 + 31596^2 .

It is a super-2 number, since 2×1142355220² = 2609950897322496800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142355223) 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 3 ways as a sum of consecutive naturals, for example, 28558861 + ... + 28558900.

It is an arithmetic number, because the mean of its divisors is an integer number (199912167).

Almost surely, 2^1142355220 is an apocalyptic number.

1142355220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142355220 is an abundant number, since it is smaller than the sum of its proper divisors (1256590784).

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

1142355220 is a wasteful number, since it uses less digits than its factorization.

1142355220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57117770 (or 57117768 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1142355220 is about 33798.7458347200. The cubic root of 1142355220 is about 1045.3628373058.

Adding to 1142355220 its reverse (225532411), we get a palindrome (1367887631).

The spelling of 1142355220 in words is "one billion, one hundred forty-two million, three hundred fifty-five thousand, two hundred twenty".