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1271 = 3141

1271 has 4 divisors (see below), whose sum is σ = 1344. Its totient is φ = 1200.

The previous prime is 1259. The next prime is 1277. The reversal of 1271 is 1721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1271 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8, base 12, base 14 and base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1271.

It is not an unprimeable number, because it can be changed into a prime (1277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 51.

It is an arithmetic number, because the mean of its divisors is an integer number (336).

21271 is an apocalyptic number.

1271 is a deficient number, since it is larger than the sum of its proper divisors (73).

1271 is an equidigital number, since it uses as much as digits as its factorization.

1271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72.

The product of its digits is 14, while the sum is 11.

The square root of 1271 is about 35.6510869400. The cubic root of 1271 is about 10.8321629242.

Adding to 1271 its reverse (1721), we get a palindrome (2992).

It can be divided in two parts, 127 and 1, that added together give a 7-th power (128 = 27).

The spelling of 1271 in words is "one thousand, two hundred seventy-one", and thus it is an iban number.

Divisors: 1 31 41 1271