421206171 has 8 divisors (see below), whose sum is σ = 561707520. Its totient is φ = 280754472.

The previous prime is 421206169. The next prime is 421206173. The reversal of 421206171 is 171602124.

It is an interprime number because it is at equal distance from previous prime (421206169) and next prime (421206173).

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

It is not a de Polignac number, because 421206171 - 2¹ = 421206169 is a prime.

It is a super-3 number, since 3×421206171³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (421206173) 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, 18106 + ... + 34208.

It is an arithmetic number, because the mean of its divisors is an integer number (70213440).

Almost surely, 2^421206171 is an apocalyptic number.

421206171 is a deficient number, since it is larger than the sum of its proper divisors (140501349).

421206171 is a wasteful number, since it uses less digits than its factorization.

421206171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24825.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 421206171 is about 20523.3079935960. The cubic root of 421206171 is about 749.6034472537.

Adding to 421206171 its reverse (171602124), we get a palindrome (592808295).

The spelling of 421206171 in words is "four hundred twenty-one million, two hundred six thousand, one hundred seventy-one".