12161617 has 8 divisors (see below), whose sum is σ = 13133120. Its totient is φ = 11195280.

The previous prime is 12161599. The next prime is 12161623. The reversal of 12161617 is 71616121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12161617 - 2⁷ = 12161489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12161591 and 12161600.

It is not an unprimeable number, because it can be changed into a prime (12161117) 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, 4642 + ... + 6772.

It is an arithmetic number, because the mean of its divisors is an integer number (1641640).

Almost surely, 2^12161617 is an apocalyptic number.

It is an amenable number.

12161617 is a deficient number, since it is larger than the sum of its proper divisors (971503).

12161617 is a wasteful number, since it uses less digits than its factorization.

12161617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its digits is 504, while the sum is 25.

The square root of 12161617 is about 3487.3510004013. The cubic root of 12161617 is about 229.9660756518.

Adding to 12161617 its reverse (71616121), we get a palindrome (83777738).

The spelling of 12161617 in words is "twelve million, one hundred sixty-one thousand, six hundred seventeen".