1143917 has 4 divisors (see below), whose sum is σ = 1156860. Its totient is φ = 1130976.

The previous prime is 1143893. The next prime is 1143943. The reversal of 1143917 is 7193411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7193411 = 23 ⋅312757.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 894916 = 499^2 + 946^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143917 - 2⁸ = 1143661 is a prime.

It is a super-2 number, since 2×1143917² = 2617092205778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6338 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (289215).

2^1143917 is an apocalyptic number.

It is an amenable number.

1143917 is a deficient number, since it is larger than the sum of its proper divisors (12943).

1143917 is an equidigital number, since it uses as much as digits as its factorization.

1143917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12942.

The product of its digits is 756, while the sum is 26.

The square root of 1143917 is about 1069.5405555658. The cubic root of 1143917 is about 104.5839012401.

The spelling of 1143917 in words is "one million, one hundred forty-three thousand, nine hundred seventeen".