1138243 has 4 divisors (see below), whose sum is σ = 1143208. Its totient is φ = 1133280.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138243 is 3428311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3428311 = 23 ⋅149057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138213) 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, 2121 + ... + 2602.

It is an arithmetic number, because the mean of its divisors is an integer number (285802).

2^1138243 is an apocalyptic number.

1138243 is a deficient number, since it is larger than the sum of its proper divisors (4965).

1138243 is an equidigital number, since it uses as much as digits as its factorization.

1138243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964.

The product of its digits is 576, while the sum is 22.

The square root of 1138243 is about 1066.8847172961. The cubic root of 1138243 is about 104.4106972690.

The spelling of 1138243 in words is "one million, one hundred thirty-eight thousand, two hundred forty-three".