1122647985 has 32 divisors (see below), whose sum is σ = 2015220480. Its totient is φ = 592925184.

The previous prime is 1122647941. The next prime is 1122647987. The reversal of 1122647985 is 5897462211.

It is not a de Polignac number, because 1122647985 - 2¹⁹ = 1122123697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1122647985.

It is not an unprimeable number, because it can be changed into a prime (1122647987) 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, 26464 + ... + 54273.

It is an arithmetic number, because the mean of its divisors is an integer number (62975640).

Almost surely, 2^1122647985 is an apocalyptic number.

1122647985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1122647985 is a deficient number, since it is larger than the sum of its proper divisors (892572495).

1122647985 is a wasteful number, since it uses less digits than its factorization.

1122647985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80854 (or 80848 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1122647985 is about 33505.9395480861. The cubic root of 1122647985 is about 1039.3166075568.

The spelling of 1122647985 in words is "one billion, one hundred twenty-two million, six hundred forty-seven thousand, nine hundred eighty-five".