2161117 has 8 divisors (see below), whose sum is σ = 2600000. Its totient is φ = 1754784.

The previous prime is 2161087. The next prime is 2161121. The reversal of 2161117 is 7111612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161094 and 2161103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161127) 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 7 ways as a sum of consecutive naturals, for example, 7992 + ... + 8257.

It is an arithmetic number, because the mean of its divisors is an integer number (325000).

2^2161117 is an apocalyptic number.

It is an amenable number.

2161117 is a deficient number, since it is larger than the sum of its proper divisors (438883).

2161117 is a wasteful number, since it uses less digits than its factorization.

2161117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16275.

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

The square root of 2161117 is about 1470.0738076709. The cubic root of 2161117 is about 129.2883600023.

Adding to 2161117 its reverse (7111612), we get a palindrome (9272729).

It can be divided in two parts, 2161 and 117, that added together give a triangular number (2278 = T₆₇).

The spelling of 2161117 in words is "two million, one hundred sixty-one thousand, one hundred seventeen".