1143212406 has 64 divisors (see below), whose sum is σ = 2763141120. Its totient is φ = 308028960.

The previous prime is 1143212377. The next prime is 1143212417. The reversal of 1143212406 is 6042123411.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 177991 + ... + 184301.

It is an arithmetic number, because the mean of its divisors is an integer number (43174080).

Almost surely, 2^1143212406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143212406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381570560).

1143212406 is an abundant number, since it is smaller than the sum of its proper divisors (1619928714).

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

1143212406 is a wasteful number, since it uses less digits than its factorization.

1143212406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6569.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1143212406 is about 33811.4241936065. The cubic root of 1143212406 is about 1045.6242406298.

Adding to 1143212406 its reverse (6042123411), we get a palindrome (7185335817).

The spelling of 1143212406 in words is "one billion, one hundred forty-three million, two hundred twelve thousand, four hundred six".