12161465 has 4 divisors (see below), whose sum is σ = 14593764. Its totient is φ = 9729168.

The previous prime is 12161459. The next prime is 12161467. The reversal of 12161465 is 56416121.

12161465 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

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 5669161 + 6492304 = 2381^2 + 2548^2 .

It is a cyclic number.

It is not a de Polignac number, because 12161465 - 2⁴ = 12161449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12161467) 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, 1216142 + ... + 1216151.

It is an arithmetic number, because the mean of its divisors is an integer number (3648441).

Almost surely, 2^12161465 is an apocalyptic number.

It is an amenable number.

12161465 is a deficient number, since it is larger than the sum of its proper divisors (2432299).

12161465 is an equidigital number, since it uses as much as digits as its factorization.

12161465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432298.

The product of its digits is 1440, while the sum is 26.

The square root of 12161465 is about 3487.3292072874. The cubic root of 12161465 is about 229.9651175833.

Adding to 12161465 its reverse (56416121), we get a palindrome (68577586).

The spelling of 12161465 in words is "twelve million, one hundred sixty-one thousand, four hundred sixty-five".