420423171 has 8 divisors (see below), whose sum is σ = 640644864. Its totient is φ = 240241800.

The previous prime is 420423151. The next prime is 420423181. The reversal of 420423171 is 171324024.

It is a happy number.

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

It is not a de Polignac number, because 420423171 - 2⁵ = 420423139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420423151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10010055 + ... + 10010096.

It is an arithmetic number, because the mean of its divisors is an integer number (80080608).

Almost surely, 2^420423171 is an apocalyptic number.

420423171 is a deficient number, since it is larger than the sum of its proper divisors (220221693).

420423171 is a wasteful number, since it uses less digits than its factorization.

420423171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020161.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 420423171 is about 20504.2232479068. The cubic root of 420423171 is about 749.1386680773.

Adding to 420423171 its reverse (171324024), we get a palindrome (591747195).

The spelling of 420423171 in words is "four hundred twenty million, four hundred twenty-three thousand, one hundred seventy-one".