12135442 has 16 divisors (see below), whose sum is σ = 20156832. Its totient is φ = 5433120.

The previous prime is 12135413. The next prime is 12135443. The reversal of 12135442 is 24453121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12135443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643 + ... + 5590.

It is an arithmetic number, because the mean of its divisors is an integer number (1259802).

Almost surely, 2^12135442 is an apocalyptic number.

12135442 is a deficient number, since it is larger than the sum of its proper divisors (8021390).

12135442 is a wasteful number, since it uses less digits than its factorization.

12135442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8313.

The product of its digits is 960, while the sum is 22.

The square root of 12135442 is about 3483.5961304376. The cubic root of 12135442 is about 229.8009746454.

Adding to 12135442 its reverse (24453121), we get a palindrome (36588563).

The spelling of 12135442 in words is "twelve million, one hundred thirty-five thousand, four hundred forty-two".