11145217 has 4 divisors (see below), whose sum is σ = 11800836. Its totient is φ = 10489600.

The previous prime is 11145187. The next prime is 11145221. The reversal of 11145217 is 71254111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71254111 = 137 ⋅520103.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 6548481 = 2144^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 11145217 - 2¹⁵ = 11112449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11145247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327784 + ... + 327817.

It is an arithmetic number, because the mean of its divisors is an integer number (2950209).

It is a Proth number, since it is equal to 2721 ⋅ 2¹² + 1 and 2721 < 2¹².

Almost surely, 2^11145217 is an apocalyptic number.

11145217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11145217 is a deficient number, since it is larger than the sum of its proper divisors (655619).

11145217 is an equidigital number, since it uses as much as digits as its factorization.

11145217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655618.

The product of its digits is 280, while the sum is 22.

The square root of 11145217 is about 3338.4452968410. The cubic root of 11145217 is about 223.3723995421.

Adding to 11145217 its reverse (71254111), we get a palindrome (82399328).

The spelling of 11145217 in words is "eleven million, one hundred forty-five thousand, two hundred seventeen".