1121243 has 4 divisors (see below), whose sum is σ = 1123488. Its totient is φ = 1119000.

The previous prime is 1121231. The next prime is 1121249. The reversal of 1121243 is 3421211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3421211 = 823 ⋅4157.

It is a cyclic number.

It is not a de Polignac number, because 1121243 - 2⁶ = 1121179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121249) 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, 5 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (280872).

2^1121243 is an apocalyptic number.

1121243 is a deficient number, since it is larger than the sum of its proper divisors (2245).

1121243 is an equidigital number, since it uses as much as digits as its factorization.

1121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244.

The product of its digits is 48, while the sum is 14.

The square root of 1121243 is about 1058.8876238771. The cubic root of 1121243 is about 103.8882861081. Note that the first 3 decimals are identical.

Adding to 1121243 its reverse (3421211), we get a palindrome (4542454).

Subtracting 1121243 from its reverse (3421211), we obtain a cube (2299968 = 132³).

The spelling of 1121243 in words is "one million, one hundred twenty-one thousand, two hundred forty-three".