421623171 has 32 divisors (see below), whose sum is σ = 668865600. Its totient is φ = 261550080.

The previous prime is 421623133. The next prime is 421623197. The reversal of 421623171 is 171326124.

421623171 is a `hidden beast` number, since 4 + 21 + 623 + 17 + 1 = 666.

It is not a de Polignac number, because 421623171 - 2⁷ = 421623043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (421623571) 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 31 ways as a sum of consecutive naturals, for example, 35691 + ... + 46011.

It is an arithmetic number, because the mean of its divisors is an integer number (20902050).

Almost surely, 2^421623171 is an apocalyptic number.

421623171 is a deficient number, since it is larger than the sum of its proper divisors (247242429).

421623171 is a wasteful number, since it uses less digits than its factorization.

421623171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436 (or 10430 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 421623171 is about 20533.4646613766. The cubic root of 421623171 is about 749.8507382966.

Adding to 421623171 its reverse (171326124), we get a palindrome (592949295).

The spelling of 421623171 in words is "four hundred twenty-one million, six hundred twenty-three thousand, one hundred seventy-one".