1281171 has 8 divisors (see below), whose sum is σ = 1808784. Its totient is φ = 803840.

The previous prime is 1281167. The next prime is 1281187. The reversal of 1281171 is 1711821.

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 1281171 - 2² = 1281167 is a prime.

1281171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1281101) 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, 12510 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (226098).

2^1281171 is an apocalyptic number.

1281171 is a deficient number, since it is larger than the sum of its proper divisors (527613).

1281171 is a wasteful number, since it uses less digits than its factorization.

1281171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25141.

The product of its digits is 112, while the sum is 21.

The square root of 1281171 is about 1131.8882453670. Note that the first 3 decimals coincide. The cubic root of 1281171 is about 108.6098048119.

Adding to 1281171 its reverse (1711821), we get a palindrome (2992992).

The spelling of 1281171 in words is "one million, two hundred eighty-one thousand, one hundred seventy-one".