12261365 has 12 divisors (see below), whose sum is σ = 15531084. Its totient is φ = 9291456.

The previous prime is 12261331. The next prime is 12261371. The reversal of 12261365 is 56316221.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 9591409 = 1634^2 + 3097^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12261365 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 1592 + ... + 5201.

It is an arithmetic number, because the mean of its divisors is an integer number (1294257).

Almost surely, 2^12261365 is an apocalyptic number.

It is an amenable number.

12261365 is a deficient number, since it is larger than the sum of its proper divisors (3269719).

12261365 is an equidigital number, since it uses as much as digits as its factorization.

12261365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836 (or 6817 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 12261365 is about 3501.6231950340. The cubic root of 12261365 is about 230.5930818312.

Adding to 12261365 its reverse (56316221), we get a palindrome (68577586).

The spelling of 12261365 in words is "twelve million, two hundred sixty-one thousand, three hundred sixty-five".