11965217 has 4 divisors (see below), whose sum is σ = 13052976. Its totient is φ = 10877460.

The previous prime is 11965207. The next prime is 11965237. The reversal of 11965217 is 71256911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11965217 - 2¹⁰ = 11964193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11965207) 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, 543863 + ... + 543884.

It is an arithmetic number, because the mean of its divisors is an integer number (3263244).

Almost surely, 2^11965217 is an apocalyptic number.

It is an amenable number.

11965217 is a deficient number, since it is larger than the sum of its proper divisors (1087759).

11965217 is a wasteful number, since it uses less digits than its factorization.

11965217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087758.

The product of its digits is 3780, while the sum is 32.

The square root of 11965217 is about 3459.0774781725. The cubic root of 11965217 is about 228.7214311321.

The spelling of 11965217 in words is "eleven million, nine hundred sixty-five thousand, two hundred seventeen".