426721171 has 4 divisors (see below), whose sum is σ = 449180200. Its totient is φ = 404262144.

The previous prime is 426721129. The next prime is 426721187. The reversal of 426721171 is 171127624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426721171 is a prime.

It is a super-2 number, since 2×426721171² = 364181915559222482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426721271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11229486 + ... + 11229523.

It is an arithmetic number, because the mean of its divisors is an integer number (112295050).

Almost surely, 2^426721171 is an apocalyptic number.

426721171 is a deficient number, since it is larger than the sum of its proper divisors (22459029).

426721171 is a wasteful number, since it uses less digits than its factorization.

426721171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22459028.

The product of its digits is 4704, while the sum is 31.

The square root of 426721171 is about 20657.2304774866. The cubic root of 426721171 is about 752.8608783283.

Adding to 426721171 its reverse (171127624), we get a palindrome (597848795).

The spelling of 426721171 in words is "four hundred twenty-six million, seven hundred twenty-one thousand, one hundred seventy-one".