171740545 has 8 divisors (see below), whose sum is σ = 218211624. Its totient is φ = 129310464.

The previous prime is 171740539. The next prime is 171740561. The reversal of 171740545 is 545047171.

It can be written as a sum of positive squares in 4 ways, for example, as 12173121 + 159567424 = 3489^2 + 12632^2 .

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 171740545 - 2⁷ = 171740417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171740545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010154 + ... + 1010323.

It is an arithmetic number, because the mean of its divisors is an integer number (27276453).

Almost surely, 2^171740545 is an apocalyptic number.

It is an amenable number.

171740545 is a deficient number, since it is larger than the sum of its proper divisors (46471079).

171740545 is a wasteful number, since it uses less digits than its factorization.

171740545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020499.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 171740545 is about 13104.9816863664. The cubic root of 171740545 is about 555.8500028842.

The spelling of 171740545 in words is "one hundred seventy-one million, seven hundred forty thousand, five hundred forty-five".