171355145 has 8 divisors (see below), whose sum is σ = 221443656. Its totient is φ = 126539136.

The previous prime is 171355133. The next prime is 171355153. The reversal of 171355145 is 541553171.

It can be written as a sum of positive squares in 4 ways, for example, as 8231161 + 163123984 = 2869^2 + 12772^2 .

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 171355145 - 2²⁰ = 170306569 is a prime.

It is a Duffinian number.

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, 1318052 + ... + 1318181.

It is an arithmetic number, because the mean of its divisors is an integer number (27680457).

Almost surely, 2^171355145 is an apocalyptic number.

It is an amenable number.

171355145 is a deficient number, since it is larger than the sum of its proper divisors (50088511).

171355145 is a wasteful number, since it uses less digits than its factorization.

171355145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636251.

The product of its digits is 10500, while the sum is 32.

The square root of 171355145 is about 13090.2690957826. The cubic root of 171355145 is about 555.4339003323.

The spelling of 171355145 in words is "one hundred seventy-one million, three hundred fifty-five thousand, one hundred forty-five".