1181243 has 6 divisors (see below), whose sum is σ = 1374156. Its totient is φ = 1012452.

The previous prime is 1181237. The next prime is 1181263. The reversal of 1181243 is 3421811.

It is not a de Polignac number, because 1181243 - 2⁸ = 1180987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12005 + ... + 12102.

It is an arithmetic number, because the mean of its divisors is an integer number (229026).

2^1181243 is an apocalyptic number.

1181243 is a deficient number, since it is larger than the sum of its proper divisors (192913).

1181243 is an equidigital number, since it uses as much as digits as its factorization.

1181243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24121 (or 24114 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 1181243 is about 1086.8500356535. The cubic root of 1181243 is about 105.7092721717.

The spelling of 1181243 in words is "one million, one hundred eighty-one thousand, two hundred forty-three".