11172225 has 24 divisors (see below), whose sum is σ = 18596032. Its totient is φ = 5918400.

The previous prime is 11172199. The next prime is 11172233. The reversal of 11172225 is 52227111.

It is not a de Polignac number, because 11172225 - 2⁵ = 11172193 is a prime.

It is a super-2 number, since 2×11172225² = 249637222901250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 13164 + ... + 13986.

Almost surely, 2^11172225 is an apocalyptic number.

11172225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11172225 is a deficient number, since it is larger than the sum of its proper divisors (7423807).

11172225 is a wasteful number, since it uses less digits than its factorization.

11172225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1012 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 11172225 is about 3342.4878459016. The cubic root of 11172225 is about 223.5526854060.

Adding to 11172225 its reverse (52227111), we get a palindrome (63399336).

The spelling of 11172225 in words is "eleven million, one hundred seventy-two thousand, two hundred twenty-five".