171240845 has 8 divisors (see below), whose sum is σ = 208304376. Its totient is φ = 135115776.

The previous prime is 171240841. The next prime is 171240857. The reversal of 171240845 is 548042171.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38576521 + 132664324 = 6211^2 + 11518^2 .

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 171240845 - 2² = 171240841 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 (171240841) 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, 234212 + ... + 234941.

It is an arithmetic number, because the mean of its divisors is an integer number (26038047).

Almost surely, 2^171240845 is an apocalyptic number.

It is an amenable number.

171240845 is a deficient number, since it is larger than the sum of its proper divisors (37063531).

171240845 is an equidigital number, since it uses as much as digits as its factorization.

171240845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469231.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 171240845 is about 13085.9025290577. The cubic root of 171240845 is about 555.3103747818.

The spelling of 171240845 in words is "one hundred seventy-one million, two hundred forty thousand, eight hundred forty-five".