1171861 has 8 divisors (see below), whose sum is σ = 1284120. Its totient is φ = 1064448.

The previous prime is 1171847. The next prime is 1171867. The reversal of 1171861 is 1681711.

It can be written as a sum of positive squares in 4 ways, for example, as 269361 + 902500 = 519^2 + 950^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171867) 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, 696 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (160515).

2^1171861 is an apocalyptic number.

It is an amenable number.

1171861 is a deficient number, since it is larger than the sum of its proper divisors (112259).

1171861 is a wasteful number, since it uses less digits than its factorization.

1171861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423.

The product of its digits is 336, while the sum is 25.

The square root of 1171861 is about 1082.5252883882. The cubic root of 1171861 is about 105.4286633190.

The spelling of 1171861 in words is "one million, one hundred seventy-one thousand, eight hundred sixty-one".