1231117 has 4 divisors (see below), whose sum is σ = 1234240. Its totient is φ = 1227996.

The previous prime is 1231099. The next prime is 1231127. The reversal of 1231117 is 7111321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1231117 - 2¹⁹ = 706829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231127) 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, 867 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (308560).

2^1231117 is an apocalyptic number.

It is an amenable number.

1231117 is a deficient number, since it is larger than the sum of its proper divisors (3123).

1231117 is an equidigital number, since it uses as much as digits as its factorization.

1231117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122.

The product of its digits is 42, while the sum is 16.

The square root of 1231117 is about 1109.5571188542. The cubic root of 1231117 is about 107.1765507576.

Adding to 1231117 its reverse (7111321), we get a palindrome (8342438).

The spelling of 1231117 in words is "one million, two hundred thirty-one thousand, one hundred seventeen".