12135340 has 96 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 3951360.

The previous prime is 12135337. The next prime is 12135349. The reversal of 12135340 is 4353121.

It is not an unprimeable number, because it can be changed into a prime (12135349) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 198910 + ... + 198970.

It is an arithmetic number, because the mean of its divisors is an integer number (325500).

Almost surely, 2^12135340 is an apocalyptic number.

12135340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12135340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15624000).

12135340 is an abundant number, since it is smaller than the sum of its proper divisors (19112660).

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

12135340 is a wasteful number, since it uses less digits than its factorization.

12135340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12135340 is about 3483.5814903630. The cubic root of 12135340 is about 229.8003308077.

Adding to 12135340 its reverse (4353121), we get a palindrome (16488461).

The spelling of 12135340 in words is "twelve million, one hundred thirty-five thousand, three hundred forty".