421324173 has 10 divisors (see below), whose sum is σ = 629385614. Its totient is φ = 280882728.

The previous prime is 421324157. The next prime is 421324177. The reversal of 421324173 is 371423124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 280830564 + 140493609 = 16758^2 + 11853^2 .

It is not a de Polignac number, because 421324173 - 2⁴ = 421324157 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421324177) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2600686 + ... + 2600847.

Almost surely, 2^421324173 is an apocalyptic number.

It is an amenable number.

421324173 is a deficient number, since it is larger than the sum of its proper divisors (208061441).

421324173 is an equidigital number, since it uses as much as digits as its factorization.

421324173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201545 (or 5201536 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 421324173 is about 20526.1826212279. The cubic root of 421324173 is about 749.6734418337.

Adding to 421324173 its reverse (371423124), we get a palindrome (792747297).

The spelling of 421324173 in words is "four hundred twenty-one million, three hundred twenty-four thousand, one hundred seventy-three".