420342425 has 24 divisors (see below), whose sum is σ = 555172056. Its totient is φ = 314608640.

The previous prime is 420342413. The next prime is 420342427. The reversal of 420342425 is 524243024.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 4631104 + 415711321 = 2152^2 + 20389^2 .

It is not a de Polignac number, because 420342425 - 2¹² = 420338329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420342394 and 420342403.

It is not an unprimeable number, because it can be changed into a prime (420342427) 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, 70667 + ... + 76383.

It is an arithmetic number, because the mean of its divisors is an integer number (23132169).

Almost surely, 2^420342425 is an apocalyptic number.

It is an amenable number.

420342425 is a deficient number, since it is larger than the sum of its proper divisors (134829631).

420342425 is a wasteful number, since it uses less digits than its factorization.

420342425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917 (or 5912 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 420342425 is about 20502.2541443618. The cubic root of 420342425 is about 749.0907054308.

Adding to 420342425 its reverse (524243024), we get a palindrome (944585449).

The spelling of 420342425 in words is "four hundred twenty million, three hundred forty-two thousand, four hundred twenty-five".