421955171 has 16 divisors (see below), whose sum is σ = 482492160. Its totient is φ = 365265120.

The previous prime is 421955161. The next prime is 421955179. The reversal of 421955171 is 171559124.

It is a happy number.

It is not a de Polignac number, because 421955171 - 2²⁶ = 354846307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421955179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54296 + ... + 61578.

It is an arithmetic number, because the mean of its divisors is an integer number (30155760).

Almost surely, 2^421955171 is an apocalyptic number.

421955171 is a deficient number, since it is larger than the sum of its proper divisors (60536989).

421955171 is a wasteful number, since it uses less digits than its factorization.

421955171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546.

The product of its digits is 12600, while the sum is 35.

The square root of 421955171 is about 20541.5474344072. The cubic root of 421955171 is about 750.0475057316.

The spelling of 421955171 in words is "four hundred twenty-one million, nine hundred fifty-five thousand, one hundred seventy-one".