1271705 has 8 divisors (see below), whose sum is σ = 1536192. Its totient is φ = 1010608.

The previous prime is 1271701. The next prime is 1271717. The reversal of 1271705 is 5071721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1271705 - 2² = 1271701 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1271701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (192024).

2^1271705 is an apocalyptic number.

It is an amenable number.

1271705 is a deficient number, since it is larger than the sum of its proper divisors (264487).

1271705 is a wasteful number, since it uses less digits than its factorization.

1271705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 1271705 is about 1127.6989846586. The cubic root of 1271705 is about 108.3416535359.

Subtracting from 1271705 its product of nonzero digits (490), we obtain a triangular number (1271215 = T₁₅₉₄).

It can be divided in two parts, 12 and 71705, that added together give a palindrome (71717).

The spelling of 1271705 in words is "one million, two hundred seventy-one thousand, seven hundred five".