171290861 has 16 divisors (see below), whose sum is σ = 208085760. Its totient is φ = 137644800.

The previous prime is 171290857. The next prime is 171290863. The reversal of 171290861 is 168092171.

It is a cyclic number.

It is not a de Polignac number, because 171290861 - 2² = 171290857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171290863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29336 + ... + 34686.

It is an arithmetic number, because the mean of its divisors is an integer number (13005360).

Almost surely, 2^171290861 is an apocalyptic number.

It is an amenable number.

171290861 is a deficient number, since it is larger than the sum of its proper divisors (36794899).

171290861 is a wasteful number, since it uses less digits than its factorization.

171290861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 171290861 is about 13087.8134537439. The cubic root of 171290861 is about 555.3644345089.

The spelling of 171290861 in words is "one hundred seventy-one million, two hundred ninety thousand, eight hundred sixty-one".