420443425 has 24 divisors (see below), whose sum is σ = 534487616. Its totient is φ = 327983040.

The previous prime is 420443423. The next prime is 420443437. The reversal of 420443425 is 524344024.

It is not a de Polignac number, because 420443425 - 2¹ = 420443423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420443393 and 420443402.

It is not an unprimeable number, because it can be changed into a prime (420443423) 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, 171307 + ... + 173743.

Almost surely, 2^420443425 is an apocalyptic number.

It is an amenable number.

420443425 is a deficient number, since it is larger than the sum of its proper divisors (114044191).

420443425 is a wasteful number, since it uses less digits than its factorization.

420443425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2612 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 420443425 is about 20504.7171402095. The cubic root of 420443425 is about 749.1506978701.

Adding to 420443425 its reverse (524344024), we get a palindrome (944787449).

The spelling of 420443425 in words is "four hundred twenty million, four hundred forty-three thousand, four hundred twenty-five".