12013535 has 4 divisors (see below), whose sum is σ = 14416248. Its totient is φ = 9610824.

The previous prime is 12013531. The next prime is 12013541. The reversal of 12013535 is 53531021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12013535 - 2² = 12013531 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 (12013531) 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, 1201349 + ... + 1201358.

It is an arithmetic number, because the mean of its divisors is an integer number (3604062).

Almost surely, 2^12013535 is an apocalyptic number.

12013535 is a deficient number, since it is larger than the sum of its proper divisors (2402713).

12013535 is an equidigital number, since it uses as much as digits as its factorization.

12013535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402712.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 12013535 is about 3466.0546735445. The cubic root of 12013535 is about 229.0288923202.

Adding to 12013535 its reverse (53531021), we get a palindrome (65544556).

The spelling of 12013535 in words is "twelve million, thirteen thousand, five hundred thirty-five".