11661325 has 24 divisors (see below), whose sum is σ = 15889608. Its totient is φ = 8436480.

The previous prime is 11661323. The next prime is 11661347. The reversal of 11661325 is 52316611.

It can be written as a sum of positive squares in 12 ways, for example, as 777924 + 10883401 = 882^2 + 3299^2 .

It is not a de Polignac number, because 11661325 - 2¹ = 11661323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 11661325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661323) by changing a digit.

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, 16887 + ... + 17563.

It is an arithmetic number, because the mean of its divisors is an integer number (662067).

Almost surely, 2^11661325 is an apocalyptic number.

It is an amenable number.

11661325 is a deficient number, since it is larger than the sum of its proper divisors (4228283).

11661325 is a wasteful number, since it uses less digits than its factorization.

11661325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 748 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 11661325 is about 3414.8682258617. The cubic root of 11661325 is about 226.7684507790.

Adding to 11661325 its reverse (52316611), we get a palindrome (63977936).

The spelling of 11661325 in words is "eleven million, six hundred sixty-one thousand, three hundred twenty-five".