1143406506 has 64 divisors (see below), whose sum is σ = 2579060736. Its totient is φ = 334953600.

The previous prime is 1143406501. The next prime is 1143406531. The reversal of 1143406506 is 6056043411.

It is not an unprimeable number, because it can be changed into a prime (1143406501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255246 + ... + 259686.

It is an arithmetic number, because the mean of its divisors is an integer number (40297824).

Almost surely, 2^1143406506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143406506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1289530368).

1143406506 is an abundant number, since it is smaller than the sum of its proper divisors (1435654230).

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

1143406506 is a wasteful number, since it uses less digits than its factorization.

1143406506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1143406506 is about 33814.2944034028. The cubic root of 1143406506 is about 1045.6834142879.

Adding to 1143406506 its reverse (6056043411), we get a palindrome (7199449917).

The spelling of 1143406506 in words is "one billion, one hundred forty-three million, four hundred six thousand, five hundred six".