420000025 has 12 divisors (see below), whose sum is σ = 527936572. Its totient is φ = 331395840.

The previous prime is 419999947. The next prime is 420000029. The reversal of 420000025 is 520000024.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 405769 + 419594256 = 637^2 + 20484^2 .

It is not a de Polignac number, because 420000025 - 2⁷ = 419999897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420000029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113244 + ... + 116893.

Almost surely, 2^420000025 is an apocalyptic number.

It is an amenable number.

420000025 is a deficient number, since it is larger than the sum of its proper divisors (107936547).

420000025 is a wasteful number, since it uses less digits than its factorization.

420000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230220 (or 230215 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 420000025 is about 20493.9021418567. The cubic root of 420000025 is about 748.8872535807.

Adding to 420000025 its reverse (520000024), we get a palindrome (940000049).

Subtracting 420000025 from its reverse (520000024), we obtain a palindrome (99999999).

The spelling of 420000025 in words is "four hundred twenty million, twenty-five", and thus it is an aban number.