1142443221 has 32 divisors (see below), whose sum is σ = 1584815232. Its totient is φ = 731566080.

The previous prime is 1142443213. The next prime is 1142443223. The reversal of 1142443221 is 1223442411.

It is not a de Polignac number, because 1142443221 - 2³ = 1142443213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142443191 and 1142443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142443223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2638221 + ... + 2638653.

It is an arithmetic number, because the mean of its divisors is an integer number (49525476).

Almost surely, 2^1142443221 is an apocalyptic number.

It is an amenable number.

1142443221 is a deficient number, since it is larger than the sum of its proper divisors (442372011).

1142443221 is a wasteful number, since it uses less digits than its factorization.

1142443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its digits is 1536, while the sum is 24.

The square root of 1142443221 is about 33800.0476478954. The cubic root of 1142443221 is about 1045.3896796900.

Adding to 1142443221 its reverse (1223442411), we get a palindrome (2365885632).

It can be divided in two parts, 11424 and 43221, that added together give a palindrome (54645).

The spelling of 1142443221 in words is "one billion, one hundred forty-two million, four hundred forty-three thousand, two hundred twenty-one".