1118729 has 4 divisors (see below), whose sum is σ = 1121040. Its totient is φ = 1116420.

The previous prime is 1118723. The next prime is 1118737. The reversal of 1118729 is 9278111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9278111 = 139 ⋅66749.

It is a cyclic number.

It is not a de Polignac number, because 1118729 - 2⁴ = 1118713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1118723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (280260).

2^1118729 is an apocalyptic number.

It is an amenable number.

1118729 is a deficient number, since it is larger than the sum of its proper divisors (2311).

1118729 is an equidigital number, since it uses as much as digits as its factorization.

1118729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its digits is 1008, while the sum is 29.

The square root of 1118729 is about 1057.6998629101. The cubic root of 1118729 is about 103.8105834772.

It can be divided in two parts, 11187 and 29, that multiplied together give a palindrome (324423).

The spelling of 1118729 in words is "one million, one hundred eighteen thousand, seven hundred twenty-nine".