11225991 has 8 divisors (see below), whose sum is σ = 17106304. Its totient is φ = 6414840.

The previous prime is 11225959. The next prime is 11226029. The reversal of 11225991 is 19952211.

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

It is not a de Polignac number, because 11225991 - 2⁵ = 11225959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11225191) 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 7 ways as a sum of consecutive naturals, for example, 267265 + ... + 267306.

It is an arithmetic number, because the mean of its divisors is an integer number (2138288).

Almost surely, 2^11225991 is an apocalyptic number.

11225991 is a deficient number, since it is larger than the sum of its proper divisors (5880313).

11225991 is an equidigital number, since it uses as much as digits as its factorization.

11225991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534581.

The product of its digits is 1620, while the sum is 30.

The square root of 11225991 is about 3350.5210042619. The cubic root of 11225991 is about 223.9107252131.

The spelling of 11225991 in words is "eleven million, two hundred twenty-five thousand, nine hundred ninety-one".