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BaseRepresentation
bin10011101000
31201112
4103220
520011
65452
73443
oct2350
91645
101256
11a42
12888
13758
1465a
1558b
hex4e8

1256 has 8 divisors (see below), whose sum is σ = 2370. Its totient is φ = 624.

The previous prime is 1249. The next prime is 1259. The reversal of 1256 is 6521.

1256 is nontrivially palindromic in base 7 and base 12.

It can be written as a sum of positive squares in only one way, i.e., 1156 + 100 = 34^2 + 10^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

1256 is a nontrivial repdigit in base 12.

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

It is a nialpdrome in base 11 and base 12.

It is a zygodrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1256.

It is not an unprimeable number, because it can be changed into a prime (1259) by changing a digit.

1256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 71 + ... + 86.

It is an amenable number.

1256 is a deficient number, since it is larger than the sum of its proper divisors (1114).

1256 is a wasteful number, since it uses less digits than its factorization.

1256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 159 counting only the distinct ones).

The product of its digits is 60, while the sum is 14.

The square root of 1256 is about 35.4400902933. The cubic root of 1256 is about 10.7893814242.

Adding to 1256 its reverse (6521), we get a palindrome (7777).

It can be divided in two parts, 125 and 6, that added together give a palindrome (131).

The spelling of 1256 in words is "one thousand, two hundred fifty-six".

Divisors: 1 2 4 8 157 314 628 1256