1161225 has 36 divisors (see below), whose sum is σ = 2245516. Its totient is φ = 570240.

The previous prime is 1161217. The next prime is 1161227. The reversal of 1161225 is 5221611.

It can be written as a sum of positive squares in 6 ways, for example, as 71289 + 1089936 = 267^2 + 1044^2 .

It is not a de Polignac number, because 1161225 - 2³ = 1161217 is a prime.

1161225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1161198 and 1161207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2727 + ... + 3123.

2^1161225 is an apocalyptic number.

1161225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161225 is a deficient number, since it is larger than the sum of its proper divisors (1084291).

1161225 is a wasteful number, since it uses less digits than its factorization.

1161225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 418 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1161225 is about 1077.6015033397. The cubic root of 1161225 is about 105.1087309042.

Adding to 1161225 its reverse (5221611), we get a palindrome (6382836).

The spelling of 1161225 in words is "one million, one hundred sixty-one thousand, two hundred twenty-five".