420402425 has 12 divisors (see below), whose sum is σ = 523924800. Its totient is φ = 334627920.

The previous prime is 420402407. The next prime is 420402467. The reversal of 420402425 is 524204024.

It is not a de Polignac number, because 420402425 - 2⁶ = 420402361 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420402425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37277 + ... + 47226.

It is an arithmetic number, because the mean of its divisors is an integer number (43660400).

Almost surely, 2^420402425 is an apocalyptic number.

It is an amenable number.

420402425 is a deficient number, since it is larger than the sum of its proper divisors (103522375).

420402425 is a wasteful number, since it uses less digits than its factorization.

420402425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84712 (or 84707 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 420402425 is about 20503.7173458863. The cubic root of 420402425 is about 749.1263456623.

Adding to 420402425 its reverse (524204024), we get a palindrome (944606449).

The spelling of 420402425 in words is "four hundred twenty million, four hundred two thousand, four hundred twenty-five".