1121247 has 24 divisors (see below), whose sum is σ = 1747200. Its totient is φ = 690768.

The previous prime is 1121231. The next prime is 1121249. The reversal of 1121247 is 7421211.

It is not a de Polignac number, because 1121247 - 2⁴ = 1121231 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13468 + ... + 13550.

It is an arithmetic number, because the mean of its divisors is an integer number (72800).

2^1121247 is an apocalyptic number.

1121247 is a deficient number, since it is larger than the sum of its proper divisors (625953).

1121247 is a wasteful number, since it uses less digits than its factorization.

1121247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 184 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1121247 is about 1058.8895126499. The cubic root of 1121247 is about 103.8884096474. Note that the first 3 decimals are identical.

Adding to 1121247 its reverse (7421211), we get a palindrome (8542458).

The spelling of 1121247 in words is "one million, one hundred twenty-one thousand, two hundred forty-seven".