13212340 has 12 divisors (see below), whose sum is σ = 27745956. Its totient is φ = 5284928.

The previous prime is 13212337. The next prime is 13212341. The reversal of 13212340 is 4321231.

It is a happy number.

13212340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1882384 + 11329956 = 1372^2 + 3366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212341) 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, 330289 + ... + 330328.

It is an arithmetic number, because the mean of its divisors is an integer number (2312163).

Almost surely, 2^13212340 is an apocalyptic number.

13212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212340 is an abundant number, since it is smaller than the sum of its proper divisors (14533616).

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

13212340 is a wasteful number, since it uses less digits than its factorization.

13212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660626 (or 660624 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13212340 is about 3634.8782648116. The cubic root of 13212340 is about 236.4067723855.

Adding to 13212340 its reverse (4321231), we get a palindrome (17533571).

The spelling of 13212340 in words is "thirteen million, two hundred twelve thousand, three hundred forty".