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BaseRepresentation
bin10011110101
31202000
4103311
520034
65513
73462
oct2365
91660
101269
11a54
12899
13768
14669
15599
hex4f5

1269 has 8 divisors (see below), whose sum is σ = 1920. Its totient is φ = 828.

The previous prime is 1259. The next prime is 1277. The reversal of 1269 is 9621.

It is not a de Polignac number, because 1269 - 25 = 1237 is a prime.

It is a super-2 number, since 2×12692 = 3220722, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 10, base 12, base 14 and base 15.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 50.

It is an arithmetic number, because the mean of its divisors is an integer number (240).

It is an amenable number.

1269 is a deficient number, since it is larger than the sum of its proper divisors (651).

1269 is an equidigital number, since it uses as much as digits as its factorization.

1269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 50 counting only the distinct ones).

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

The square root of 1269 is about 35.6230262611. The cubic root of 1269 is about 10.8264782404.

It can be divided in two parts, 12 and 69, that multiplied together give a palindrome (828).

The spelling of 1269 in words is "one thousand, two hundred sixty-nine".

Divisors: 1 3 9 27 47 141 423 1269