1115543406 has 32 divisors (see below), whose sum is σ = 2335858560. Its totient is φ = 354695264.

The previous prime is 1115543393. The next prime is 1115543411. The reversal of 1115543406 is 6043455111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24180 + ... + 53063.

It is an arithmetic number, because the mean of its divisors is an integer number (72995580).

Almost surely, 2^1115543406 is an apocalyptic number.

1115543406 is an abundant number, since it is smaller than the sum of its proper divisors (1220315154).

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

1115543406 is a wasteful number, since it uses less digits than its factorization.

1115543406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77360.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1115543406 is about 33399.7515859026. The cubic root of 1115543406 is about 1037.1195585047.

Adding to 1115543406 its reverse (6043455111), we get a palindrome (7158998517).

It can be divided in two parts, 111554 and 3406, that added together give a triangular number (114960 = T₄₇₉).

The spelling of 1115543406 in words is "one billion, one hundred fifteen million, five hundred forty-three thousand, four hundred six".