1231171 has 2 divisors, whose sum is σ = 1231172. Its totient is φ = 1231170.

The previous prime is 1231141. The next prime is 1231177. The reversal of 1231171 is 1711321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231171 - 2¹⁵ = 1198403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615585 + 615586.

It is an arithmetic number, because the mean of its divisors is an integer number (615586).

2^1231171 is an apocalyptic number.

1231171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231171 is an equidigital number, since it uses as much as digits as its factorization.

1231171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 16.

The square root of 1231171 is about 1109.5814526208. The cubic root of 1231171 is about 107.1781177490.

Adding to 1231171 its reverse (1711321), we get a palindrome (2942492).

The spelling of 1231171 in words is "one million, two hundred thirty-one thousand, one hundred seventy-one".