420389025 has 24 divisors (see below), whose sum is σ = 794336064. Its totient is φ = 192177600.

The previous prime is 420389023. The next prime is 420389029. The reversal of 420389025 is 520983024.

It is a happy number.

It is not a de Polignac number, because 420389025 - 2¹ = 420389023 is a prime.

It is a super-3 number, since 3×420389025³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420389023) 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 23 ways as a sum of consecutive naturals, for example, 399846 + ... + 400895.

It is an arithmetic number, because the mean of its divisors is an integer number (33097336).

Almost surely, 2^420389025 is an apocalyptic number.

It is an amenable number.

420389025 is a deficient number, since it is larger than the sum of its proper divisors (373947039).

420389025 is a wasteful number, since it uses less digits than its factorization.

420389025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800761 (or 800756 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 420389025 is about 20503.3905732686. The cubic root of 420389025 is about 749.1183863047.

The spelling of 420389025 in words is "four hundred twenty million, three hundred eighty-nine thousand, twenty-five".