421056171 has 16 divisors (see below), whose sum is σ = 626544000. Its totient is φ = 279463464.

The previous prime is 421056157. The next prime is 421056217. The reversal of 421056171 is 171650124.

It is a happy number.

421056171 is a `hidden beast` number, since 42 + 1 + 0 + 5 + 617 + 1 = 666.

It is not a de Polignac number, because 421056171 - 2⁶ = 421056107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (421056121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28221 + ... + 40478.

It is an arithmetic number, because the mean of its divisors is an integer number (39159000).

Almost surely, 2^421056171 is an apocalyptic number.

421056171 is a deficient number, since it is larger than the sum of its proper divisors (205487829).

421056171 is a wasteful number, since it uses less digits than its factorization.

421056171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68935 (or 68929 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 421056171 is about 20519.6532865446. The cubic root of 421056171 is about 749.5144537276.

The spelling of 421056171 in words is "four hundred twenty-one million, fifty-six thousand, one hundred seventy-one".