13212660 has 72 divisors (see below), whose sum is σ = 38209248. Its totient is φ = 3411200.

The previous prime is 13212643. The next prime is 13212677. The reversal of 13212660 is 6621231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13212643) and next prime (13212677).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100795 + ... + 100925.

It is an arithmetic number, because the mean of its divisors is an integer number (530684).

Almost surely, 2^13212660 is an apocalyptic number.

13212660 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 13212660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19104624).

13212660 is an abundant number, since it is smaller than the sum of its proper divisors (24996588).

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

13212660 is a wasteful number, since it uses less digits than its factorization.

13212660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13212660 is about 3634.9222825254. The cubic root of 13212660 is about 236.4086809436.

Adding to 13212660 its reverse (6621231), we get a palindrome (19833891).

The spelling of 13212660 in words is "thirteen million, two hundred twelve thousand, six hundred sixty".