11561465 has 4 divisors (see below), whose sum is σ = 13873764. Its totient is φ = 9249168.

The previous prime is 11561461. The next prime is 11561471. The reversal of 11561465 is 56416511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 4507129 = 2656^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 11561465 - 2² = 11561461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561461) 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 3 ways as a sum of consecutive naturals, for example, 1156142 + ... + 1156151.

It is an arithmetic number, because the mean of its divisors is an integer number (3468441).

Almost surely, 2^11561465 is an apocalyptic number.

It is an amenable number.

11561465 is a deficient number, since it is larger than the sum of its proper divisors (2312299).

11561465 is an equidigital number, since it uses as much as digits as its factorization.

11561465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312298.

The product of its digits is 3600, while the sum is 29.

The square root of 11561465 is about 3400.2154343512. The cubic root of 11561465 is about 226.1192950992.

Adding to 11561465 its reverse (56416511), we get a palindrome (67977976).

The spelling of 11561465 in words is "eleven million, five hundred sixty-one thousand, four hundred sixty-five".