1118121 has 4 divisors (see below), whose sum is σ = 1490832. Its totient is φ = 745412.

The previous prime is 1118113. The next prime is 1118123. The reversal of 1118121 is 1218111.

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: 1218111 = 3 ⋅406037.

It is a cyclic number.

It is not a de Polignac number, because 1118121 - 2³ = 1118113 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1118121.

It is not an unprimeable number, because it can be changed into a prime (1118123) 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, 186351 + ... + 186356.

It is an arithmetic number, because the mean of its divisors is an integer number (372708).

2^1118121 is an apocalyptic number.

It is an amenable number.

1118121 is a deficient number, since it is larger than the sum of its proper divisors (372711).

1118121 is an equidigital number, since it uses as much as digits as its factorization.

1118121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372710.

The product of its digits is 16, while the sum is 15.

The square root of 1118121 is about 1057.4124077199. The cubic root of 1118121 is about 103.7917739554.

The spelling of 1118121 in words is "one million, one hundred eighteen thousand, one hundred twenty-one".