1118564 has 6 divisors (see below), whose sum is σ = 1957494. Its totient is φ = 559280.

The previous prime is 1118563. The next prime is 1118567. The reversal of 1118564 is 4658111.

It can be written as a sum of positive squares in only one way, i.e., 708964 + 409600 = 842^2 + 640^2 .

It is not an unprimeable number, because it can be changed into a prime (1118563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139817 + ... + 139824.

It is an arithmetic number, because the mean of its divisors is an integer number (326249).

2^1118564 is an apocalyptic number.

It is an amenable number.

1118564 is a deficient number, since it is larger than the sum of its proper divisors (838930).

1118564 is a wasteful number, since it uses less digits than its factorization.

1118564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279645 (or 279643 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 1118564 is about 1057.6218605910. The cubic root of 1118564 is about 103.8054795934.

The spelling of 1118564 in words is "one million, one hundred eighteen thousand, five hundred sixty-four".