1216117 has 8 divisors (see below), whose sum is σ = 1411136. Its totient is φ = 1026432.

The previous prime is 1216109. The next prime is 1216123. The reversal of 1216117 is 7116121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(1216117) divides (1216117-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 1216117 - 2³ = 1216109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216094 and 1216103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216147) 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 7 ways as a sum of consecutive naturals, for example, 828 + ... + 1765.

It is an arithmetic number, because the mean of its divisors is an integer number (176392).

2^1216117 is an apocalyptic number.

It is an amenable number.

1216117 is a deficient number, since it is larger than the sum of its proper divisors (195019).

1216117 is an equidigital number, since it uses as much as digits as its factorization.

1216117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667.

The product of its digits is 84, while the sum is 19.

The square root of 1216117 is about 1102.7769493420. The cubic root of 1216117 is about 106.7394891175.

It can be divided in two parts, 12 and 16117, that added together give a square (16129 = 127²).

The spelling of 1216117 in words is "one million, two hundred sixteen thousand, one hundred seventeen".