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12261 = 36167
BaseRepresentation
bin10111111100101
3121211010
42333211
5343021
6132433
750514
oct27745
917733
1012261
119237
127119
135772
14467b
153976
hex2fe5

12261 has 8 divisors (see below), whose sum is σ = 16864. Its totient is φ = 7920.

The previous prime is 12253. The next prime is 12263. The reversal of 12261 is 16221.

Adding to 12261 its reverse (16221), we get a palindrome (28482).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12261 - 23 = 12253 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12261.

It is not an unprimeable number, because it can be changed into a prime (12263) 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, 150 + ... + 216.

It is an arithmetic number, because the mean of its divisors is an integer number (2108).

212261 is an apocalyptic number.

It is an amenable number.

12261 is a deficient number, since it is larger than the sum of its proper divisors (4603).

12261 is an equidigital number, since it uses as much as digits as its factorization.

12261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131.

The product of its digits is 24, while the sum is 12.

The square root of 12261 is about 110.7293998900. The cubic root of 12261 is about 23.0590793687.

The spelling of 12261 in words is "twelve thousand, two hundred sixty-one".

Divisors: 1 3 61 67 183 201 4087 12261