11561225 has 12 divisors (see below), whose sum is σ = 15439116. Its totient is φ = 8537280.

The previous prime is 11561219. The next prime is 11561237. The reversal of 11561225 is 52216511.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2876416 + 8684809 = 1696^2 + 2947^2 .

It is not a de Polignac number, because 11561225 - 2⁶ = 11561161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11561225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17462 + ... + 18111.

It is an arithmetic number, because the mean of its divisors is an integer number (1286593).

Almost surely, 2^11561225 is an apocalyptic number.

It is an amenable number.

11561225 is a deficient number, since it is larger than the sum of its proper divisors (3877891).

11561225 is a wasteful number, since it uses less digits than its factorization.

11561225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35596 (or 35591 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 11561225 is about 3400.1801422866. The cubic root of 11561225 is about 226.1177304473.

Adding to 11561225 its reverse (52216511), we get a palindrome (63777736).

It can be divided in two parts, 1156 and 1225, that multiplied together give a square (1416100 = 1190²).

The spelling of 11561225 in words is "eleven million, five hundred sixty-one thousand, two hundred twenty-five".