171091012 has 12 divisors (see below), whose sum is σ = 299709676. Its totient is φ = 85459680.

The previous prime is 171090979. The next prime is 171091013. The reversal of 171091012 is 210190171.

It can be written as a sum of positive squares in 2 ways, for example, as 129823236 + 41267776 = 11394^2 + 6424^2 .

It is not an unprimeable number, because it can be changed into a prime (171091013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16863 + ... + 25030.

Almost surely, 2^171091012 is an apocalyptic number.

It is an amenable number.

171091012 is a deficient number, since it is larger than the sum of its proper divisors (128618664).

171091012 is a wasteful number, since it uses less digits than its factorization.

171091012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42918 (or 42916 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 171091012 is about 13080.1762985061. The cubic root of 171091012 is about 555.1483649558.

The spelling of 171091012 in words is "one hundred seventy-one million, ninety-one thousand, twelve".