1118565 has 48 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 494208.

The previous prime is 1118563. The next prime is 1118567. The reversal of 1118565 is 5658111.

It is an interprime number because it is at equal distance from previous prime (1118563) and next prime (1118567).

It is not a de Polignac number, because 1118565 - 2¹ = 1118563 is a prime.

1118565 is a lucky number.

It is a congruent number.

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

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16662 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (47736).

2^1118565 is an apocalyptic number.

1118565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1118565 is an abundant number, since it is smaller than the sum of its proper divisors (1172763).

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

1118565 is a wasteful number, since it uses less digits than its factorization.

1118565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 135 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1118565 is about 1057.6223333497. The cubic root of 1118565 is about 103.8055105275.

The spelling of 1118565 in words is "one million, one hundred eighteen thousand, five hundred sixty-five".