11951217 has 24 divisors (see below), whose sum is σ = 17858880. Its totient is φ = 7697760.

The previous prime is 11951189. The next prime is 11951243. The reversal of 11951217 is 71215911.

It is not a de Polignac number, because 11951217 - 2²⁰ = 10902641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11951287) 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 23 ways as a sum of consecutive naturals, for example, 37543 + ... + 37859.

It is an arithmetic number, because the mean of its divisors is an integer number (744120).

Almost surely, 2^11951217 is an apocalyptic number.

It is an amenable number.

11951217 is a deficient number, since it is larger than the sum of its proper divisors (5907663).

11951217 is a wasteful number, since it uses less digits than its factorization.

11951217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 450 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 11951217 is about 3457.0532249302. The cubic root of 11951217 is about 228.6321905238.

The spelling of 11951217 in words is "eleven million, nine hundred fifty-one thousand, two hundred seventeen".