420144171 has 8 divisors (see below), whose sum is σ = 593144784. Its totient is φ = 263619840.

The previous prime is 420144163. The next prime is 420144211. The reversal of 420144171 is 171441024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420144171 - 2³ = 420144163 is a prime.

It is a super-2 number, since 2×420144171² = 353042248850554482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420144121) 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 7 ways as a sum of consecutive naturals, for example, 4119010 + ... + 4119111.

It is an arithmetic number, because the mean of its divisors is an integer number (74143098).

Almost surely, 2^420144171 is an apocalyptic number.

420144171 is a deficient number, since it is larger than the sum of its proper divisors (173000613).

420144171 is a wasteful number, since it uses less digits than its factorization.

420144171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8238141.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 420144171 is about 20497.4186423559. The cubic root of 420144171 is about 748.9729176668.

Adding to 420144171 its reverse (171441024), we get a palindrome (591585195).

The spelling of 420144171 in words is "four hundred twenty million, one hundred forty-four thousand, one hundred seventy-one".