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12369 = 371931
BaseRepresentation
bin11000001010001
3121222010
43001101
5343434
6133133
751030
oct30121
917863
1012369
119325
1271a9
135826
144717
1539e9
hex3051

12369 has 16 divisors (see below), whose sum is σ = 20480. Its totient is φ = 6480.

The previous prime is 12347. The next prime is 12373. The reversal of 12369 is 96321.

12369 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 12369 - 27 = 12241 is a prime.

It is a super-2 number, since 2×123692 = 305984322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

12369 is an undulating number in base 5.

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 (12329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384 + ... + 414.

It is an arithmetic number, because the mean of its divisors is an integer number (1280).

212369 is an apocalyptic number.

12369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12369 is a deficient number, since it is larger than the sum of its proper divisors (8111).

12369 is a wasteful number, since it uses less digits than its factorization.

12369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60.

The product of its digits is 324, while the sum is 21.

The square root of 12369 is about 111.2160060423. The cubic root of 12369 is about 23.1265862072.

The spelling of 12369 in words is "twelve thousand, three hundred sixty-nine".

Divisors: 1 3 7 19 21 31 57 93 133 217 399 589 651 1767 4123 12369