12261271 has 4 divisors (see below), whose sum is σ = 13375944. Its totient is φ = 11146600.

The previous prime is 12261269. The next prime is 12261281. The reversal of 12261271 is 17216221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12261271 - 2¹ = 12261269 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261211) 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, 557320 + ... + 557341.

It is an arithmetic number, because the mean of its divisors is an integer number (3343986).

Almost surely, 2^12261271 is an apocalyptic number.

12261271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12261271 is a deficient number, since it is larger than the sum of its proper divisors (1114673).

12261271 is a wasteful number, since it uses less digits than its factorization.

12261271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114672.

The product of its digits is 336, while the sum is 22.

The square root of 12261271 is about 3501.6097726617. The cubic root of 12261271 is about 230.5924925600.

Multiplying 12261271 by its sum of digits (22), we get a palindrome (269747962).

Adding to 12261271 its reverse (17216221), we get a palindrome (29477492).

The spelling of 12261271 in words is "twelve million, two hundred sixty-one thousand, two hundred seventy-one".