1321171 has 2 divisors, whose sum is σ = 1321172. Its totient is φ = 1321170.

The previous prime is 1321169. The next prime is 1321193. The reversal of 1321171 is 1711231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321171 - 2¹ = 1321169 is a prime.

It is a super-2 number, since 2×1321171² = 3490985622482, which contains 22 as substring.

Together with 1321169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660585 + 660586.

It is an arithmetic number, because the mean of its divisors is an integer number (660586).

2^1321171 is an apocalyptic number.

1321171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321171 is an equidigital number, since it uses as much as digits as its factorization.

1321171 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 1321171 is about 1149.4220286735. The cubic root of 1321171 is about 109.7285593828.

The spelling of 1321171 in words is "one million, three hundred twenty-one thousand, one hundred seventy-one".