171240872 has 16 divisors (see below), whose sum is σ = 350265600. Its totient is φ = 77836720.

The previous prime is 171240857. The next prime is 171240877. The reversal of 171240872 is 278042171.

It is a happy number.

171240872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (171240877) 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, 972872 + ... + 973047.

It is an arithmetic number, because the mean of its divisors is an integer number (21891600).

Almost surely, 2^171240872 is an apocalyptic number.

It is an amenable number.

171240872 is an abundant number, since it is smaller than the sum of its proper divisors (179024728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171240872 is a wasteful number, since it uses less digits than its factorization.

171240872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945936 (or 1945932 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 171240872 is about 13085.9035607023. The cubic root of 171240872 is about 555.3104039675.

The spelling of 171240872 in words is "one hundred seventy-one million, two hundred forty thousand, eight hundred seventy-two".