911225 has 24 divisors (see below), whose sum is σ = 1333248. Its totient is φ = 604800.

The previous prime is 911219. The next prime is 911227. The reversal of 911225 is 522119.

911225 = T₁₉₀ + T₁₉₁ + ... + T₂₃₀.

It is not a de Polignac number, because 911225 - 2⁶ = 911161 is a prime.

It is an Ulam number.

Its product of digits (180) is a multiple of the sum of its prime divisors (180).

It is a junction number, because it is equal to n+sod(n) for n = 911197 and 911206.

It is not an unprimeable number, because it can be changed into a prime (911227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7112 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (55552).

2⁹¹¹²²⁵ is an apocalyptic number.

It is an amenable number.

911225 is a deficient number, since it is larger than the sum of its proper divisors (422023).

911225 is a wasteful number, since it uses less digits than its factorization.

911225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 180 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 911225 is about 954.5810599420. The cubic root of 911225 is about 96.9486744447.

It can be divided in two parts, 9 and 11225, that multiplied together give a triangular number (101025 = T₄₄₉).

The spelling of 911225 in words is "nine hundred eleven thousand, two hundred twenty-five".