1291171 has 8 divisors (see below), whose sum is σ = 1487360. Its totient is φ = 1097928.

The previous prime is 1291163. The next prime is 1291177. The reversal of 1291171 is 1711921.

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 1291171 - 2³ = 1291163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1291177) 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, 310 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (185920).

2^1291171 is an apocalyptic number.

1291171 is a deficient number, since it is larger than the sum of its proper divisors (196189).

1291171 is a wasteful number, since it uses less digits than its factorization.

1291171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 126, while the sum is 22.

The square root of 1291171 is about 1136.2970562313. The cubic root of 1291171 is about 108.8916522892.

The spelling of 1291171 in words is "one million, two hundred ninety-one thousand, one hundred seventy-one".