171056487 has 32 divisors (see below), whose sum is σ = 277516800. Its totient is φ = 91542528.

The previous prime is 171056477. The next prime is 171056507. The reversal of 171056487 is 784650171.

171056487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 171056487 - 2⁶ = 171056423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171056437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33103 + ... + 37919.

It is an arithmetic number, because the mean of its divisors is an integer number (8672400).

Almost surely, 2^171056487 is an apocalyptic number.

171056487 is a deficient number, since it is larger than the sum of its proper divisors (106460313).

171056487 is a wasteful number, since it uses less digits than its factorization.

171056487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 171056487 is about 13078.8564867117. The cubic root of 171056487 is about 555.1110207251. Note that the first 3 decimals are identical.

The spelling of 171056487 in words is "one hundred seventy-one million, fifty-six thousand, four hundred eighty-seven".