12135534 has 16 divisors (see below), whose sum is σ = 24447360. Its totient is φ = 4015800.

The previous prime is 12135521. The next prime is 12135551. The reversal of 12135534 is 43553121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6442 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (1527960).

Almost surely, 2^12135534 is an apocalyptic number.

12135534 is an abundant number, since it is smaller than the sum of its proper divisors (12311826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12135534 is a wasteful number, since it uses less digits than its factorization.

12135534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14695.

The product of its digits is 1800, while the sum is 24.

The square root of 12135534 is about 3483.6093351580. The cubic root of 12135534 is about 229.8015553587.

Adding to 12135534 its reverse (43553121), we get a palindrome (55688655).

The spelling of 12135534 in words is "twelve million, one hundred thirty-five thousand, five hundred thirty-four".