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12069 = 34149
BaseRepresentation
bin10111100100101
3121120000
42330211
5341234
6131513
750121
oct27445
917500
1012069
119082
126b99
135655
144581
153899
hex2f25

12069 has 10 divisors (see below), whose sum is σ = 18150. Its totient is φ = 7992.

The previous prime is 12049. The next prime is 12071. The reversal of 12069 is 96021.

It can be written as a sum of positive squares in only one way, i.e., 8100 + 3969 = 90^2 + 63^2 .

It is not a de Polignac number, because 12069 - 25 = 12037 is a prime.

It is a super-2 number, since 2×120692 = 291321522, which contains 22 as substring.

12069 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12049) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7 + ... + 155.

It is an arithmetic number, because the mean of its divisors is an integer number (1815).

212069 is an apocalyptic number.

It is an amenable number.

12069 is a deficient number, since it is larger than the sum of its proper divisors (6081).

12069 is an equidigital number, since it uses as much as digits as its factorization.

12069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12069 is about 109.8590005416. The cubic root of 12069 is about 22.9380817266.

The spelling of 12069 in words is "twelve thousand, sixty-nine".

Divisors: 1 3 9 27 81 149 447 1341 4023 12069