1142143205 has 24 divisors (see below), whose sum is σ = 1595997720. Its totient is φ = 782369280.

The previous prime is 1142143201. The next prime is 1142143217. The reversal of 1142143205 is 5023412411.

It can be written as a sum of positive squares in 4 ways, for example, as 126382564 + 1015760641 = 11242^2 + 31871^2 .

It is not a de Polignac number, because 1142143205 - 2² = 1142143201 is a prime.

It is a super-2 number, since 2×1142143205² = 2608982201455344050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142143201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321881 + ... + 325409.

It is an arithmetic number, because the mean of its divisors is an integer number (66499905).

Almost surely, 2^1142143205 is an apocalyptic number.

It is an amenable number.

1142143205 is a deficient number, since it is larger than the sum of its proper divisors (453854515).

1142143205 is a wasteful number, since it uses less digits than its factorization.

1142143205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869 (or 4862 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1142143205 is about 33795.6092562333. The cubic root of 1142143205 is about 1045.2981620598.

Adding to 1142143205 its reverse (5023412411), we get a palindrome (6165555616).

The spelling of 1142143205 in words is "one billion, one hundred forty-two million, one hundred forty-three thousand, two hundred five".