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BaseRepresentation
bin10011111101
31202022
4103331
520102
65525
73503
oct2375
91668
101277
11a61
128a5
13773
14673
155a2
hex4fd

1277 has 2 divisors, whose sum is σ = 1278. Its totient is φ = 1276.

The previous prime is 1259. The next prime is 1279. The reversal of 1277 is 7721.

It is a happy number.

1277 is nontrivially palindromic in base 5.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156 + 121 = 34^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277 - 26 = 1213 is a prime.

Together with 1279, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 9 and base 10.

It is a nialpdrome in base 11 and base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638 + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (639).

21277 is an apocalyptic number.

It is an amenable number.

1277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277 is an equidigital number, since it uses as much as digits as its factorization.

1277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98, while the sum is 17.

The square root of 1277 is about 35.7351367704. The cubic root of 1277 is about 10.8491812757.

Adding to 1277 its reverse (7721), we get a palindrome (8998).

The spelling of 1277 in words is "one thousand, two hundred seventy-seven", and thus it is an iban number.