12145565 has 16 divisors (see below), whose sum is σ = 15795648. Its totient is φ = 8929536.

The previous prime is 12145561. The next prime is 12145571. The reversal of 12145565 is 56554121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12145565 - 2² = 12145561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1994 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (987228).

Almost surely, 2^12145565 is an apocalyptic number.

It is an amenable number.

12145565 is a deficient number, since it is larger than the sum of its proper divisors (3650083).

12145565 is a wasteful number, since it uses less digits than its factorization.

12145565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388.

The product of its digits is 6000, while the sum is 29.

The square root of 12145565 is about 3485.0487801464. The cubic root of 12145565 is about 229.8648544429.

Adding to 12145565 its reverse (56554121), we get a palindrome (68699686).

The spelling of 12145565 in words is "twelve million, one hundred forty-five thousand, five hundred sixty-five".