12161265 has 16 divisors (see below), whose sum is σ = 19778496. Its totient is φ = 6379200.

The previous prime is 12161251. The next prime is 12161287. The reversal of 12161265 is 56216121.

12161265 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12161265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5731 + ... + 7560.

It is an arithmetic number, because the mean of its divisors is an integer number (1236156).

Almost surely, 2^12161265 is an apocalyptic number.

12161265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12161265 is a deficient number, since it is larger than the sum of its proper divisors (7617231).

12161265 is a wasteful number, since it uses less digits than its factorization.

12161265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360.

The product of its digits is 720, while the sum is 24.

The square root of 12161265 is about 3487.3005319301. The cubic root of 12161265 is about 229.9638569545.

Adding to 12161265 its reverse (56216121), we get a palindrome (68377386).

The spelling of 12161265 in words is "twelve million, one hundred sixty-one thousand, two hundred sixty-five".