13212261 has 8 divisors (see below), whose sum is σ = 19573760. Its totient is φ = 8808156.

The previous prime is 13212259. The next prime is 13212263. The reversal of 13212261 is 16221231.

13212261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13212259) and next prime (13212263).

It is not a de Polignac number, because 13212261 - 2¹ = 13212259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212263) 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, 244645 + ... + 244698.

It is an arithmetic number, because the mean of its divisors is an integer number (2446720).

Almost surely, 2^13212261 is an apocalyptic number.

It is an amenable number.

13212261 is a deficient number, since it is larger than the sum of its proper divisors (6361499).

13212261 is an equidigital number, since it uses as much as digits as its factorization.

13212261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489352 (or 489346 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 13212261 is about 3634.8673978565. The cubic root of 13212261 is about 236.4063012054.

Adding to 13212261 its reverse (16221231), we get a palindrome (29433492).

The spelling of 13212261 in words is "thirteen million, two hundred twelve thousand, two hundred sixty-one".