12145535 has 4 divisors (see below), whose sum is σ = 14574648. Its totient is φ = 9716424.

The previous prime is 12145513. The next prime is 12145537. The reversal of 12145535 is 53554121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53554121 = 211 ⋅253811.

It is a cyclic number.

It is not a de Polignac number, because 12145535 - 2⁸ = 12145279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214549 + ... + 1214558.

It is an arithmetic number, because the mean of its divisors is an integer number (3643662).

Almost surely, 2^12145535 is an apocalyptic number.

12145535 is a deficient number, since it is larger than the sum of its proper divisors (2429113).

12145535 is an equidigital number, since it uses as much as digits as its factorization.

12145535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429112.

The product of its digits is 3000, while the sum is 26.

The square root of 12145535 is about 3485.0444760433. The cubic root of 12145535 is about 229.8646651845.

Adding to 12145535 its reverse (53554121), we get a palindrome (65699656).

The spelling of 12145535 in words is "twelve million, one hundred forty-five thousand, five hundred thirty-five".