424401225 has 24 divisors (see below), whose sum is σ = 725876160. Its totient is φ = 218541120.

The previous prime is 424401199. The next prime is 424401227. The reversal of 424401225 is 522104424.

It is a happy number.

It is not a de Polignac number, because 424401225 - 2²¹ = 422304073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 424401195 and 424401204.

It is not an unprimeable number, because it can be changed into a prime (424401227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95389 + ... + 99738.

It is an arithmetic number, because the mean of its divisors is an integer number (30244840).

Almost surely, 2^424401225 is an apocalyptic number.

It is an amenable number.

424401225 is a deficient number, since it is larger than the sum of its proper divisors (301474935).

424401225 is a wasteful number, since it uses less digits than its factorization.

424401225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195169 (or 195164 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 424401225 is about 20601.0005824960. Note that the first 3 decimals coincide. The cubic root of 424401225 is about 751.4940440226.

Subtracting from 424401225 its sum of digits (24), we obtain a square (424401201 = 20601²).

Adding to 424401225 its reverse (522104424), we get a palindrome (946505649).

The spelling of 424401225 in words is "four hundred twenty-four million, four hundred one thousand, two hundred twenty-five".