21060171 has 36 divisors (see below), whose sum is σ = 33985224. Its totient is φ = 12555840.

The previous prime is 21060163. The next prime is 21060173. The reversal of 21060171 is 17106012.

It is not a de Polignac number, because 21060171 - 2³ = 21060163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21060173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 90271 + ... + 90503.

It is an arithmetic number, because the mean of its divisors is an integer number (944034).

Almost surely, 2^21060171 is an apocalyptic number.

21060171 is a deficient number, since it is larger than the sum of its proper divisors (12925053).

21060171 is a wasteful number, since it uses less digits than its factorization.

21060171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 21060171 is about 4589.1361932285. The cubic root of 21060171 is about 276.1556699013.

Adding to 21060171 its reverse (17106012), we get a palindrome (38166183).

The spelling of 21060171 in words is "twenty-one million, sixty thousand, one hundred seventy-one".