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12255 = 351943

12255 has 16 divisors (see below), whose sum is σ = 21120. Its totient is φ = 6048.

The previous prime is 12253. The next prime is 12263. The reversal of 12255 is 55221.

Adding to 12255 its reverse (55221), we get a palindrome (67476).

12255 = T26 + T27 + ... + T44.

12255 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 12255 - 21 = 12253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

12255 is an undulating number in base 7.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 306.

It is an arithmetic number, because the mean of its divisors is an integer number (1320).

212255 is an apocalyptic number.

12255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12255 is a deficient number, since it is larger than the sum of its proper divisors (8865).

12255 is a wasteful number, since it uses less digits than its factorization.

12255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70.

The product of its digits is 100, while the sum is 15.

The square root of 12255 is about 110.7023034991. The cubic root of 12255 is about 23.0553173849.

The spelling of 12255 in words is "twelve thousand, two hundred fifty-five".

Divisors: 1 3 5 15 19 43 57 95 129 215 285 645 817 2451 4085 12255