420050025 has 72 divisors (see below), whose sum is σ = 802147320. Its totient is φ = 209387520.

The previous prime is 420050003. The next prime is 420050047. The reversal of 420050025 is 520050024.

It is an interprime number because it is at equal distance from previous prime (420050003) and next prime (420050047).

It can be written as a sum of positive squares in 12 ways, for example, as 176783616 + 243266409 = 13296^2 + 15597^2 .

It is not a de Polignac number, because 420050025 - 2¹³ = 420041833 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 737941 + ... + 738509.

It is an arithmetic number, because the mean of its divisors is an integer number (11140935).

Almost surely, 2^420050025 is an apocalyptic number.

420050025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420050025 is a deficient number, since it is larger than the sum of its proper divisors (382097295).

420050025 is a wasteful number, since it uses less digits than its factorization.

420050025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 420050025 is about 20495.1219806080. The cubic root of 420050025 is about 748.9169701479.

Subtracting 420050025 from its reverse (520050024), we obtain a palindrome (99999999).

The spelling of 420050025 in words is "four hundred twenty million, fifty thousand, twenty-five".