1122543999 has 24 divisors (see below), whose sum is σ = 1675572912. Its totient is φ = 723634560.

The previous prime is 1122543973. The next prime is 1122544013. The reversal of 1122543999 is 9993452211.

1122543999 is a `hidden beast` number, since 1 + 1 + 2 + 254 + 399 + 9 = 666.

It is not a de Polignac number, because 1122543999 - 2¹³ = 1122535807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122593999) 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 23 ways as a sum of consecutive naturals, for example, 43939 + ... + 64619.

It is an arithmetic number, because the mean of its divisors is an integer number (69815538).

Almost surely, 2^1122543999 is an apocalyptic number.

1122543999 is a deficient number, since it is larger than the sum of its proper divisors (553028913).

1122543999 is a wasteful number, since it uses less digits than its factorization.

1122543999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20887 (or 20884 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 1122543999 is about 33504.3877574266. The cubic root of 1122543999 is about 1039.2845174404.

The spelling of 1122543999 in words is "one billion, one hundred twenty-two million, five hundred forty-three thousand, nine hundred ninety-nine".