1216617 has 8 divisors (see below), whose sum is σ = 1629024. Its totient is φ = 807648.

The previous prime is 1216603. The next prime is 1216619. The reversal of 1216617 is 7166121.

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

It is not a de Polignac number, because 1216617 - 2⁴ = 1216601 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1216619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (203628).

2^1216617 is an apocalyptic number.

It is an amenable number.

1216617 is a deficient number, since it is larger than the sum of its proper divisors (412407).

1216617 is a wasteful number, since it uses less digits than its factorization.

1216617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its digits is 504, while the sum is 24.

The square root of 1216617 is about 1103.0036264673. The cubic root of 1216617 is about 106.7541155699.

Adding to 1216617 its product of digits (504), we get a palindrome (1217121).

The spelling of 1216617 in words is "one million, two hundred sixteen thousand, six hundred seventeen".