420325405 has 4 divisors (see below), whose sum is σ = 504390492. Its totient is φ = 336260320.

The previous prime is 420325397. The next prime is 420325463. The reversal of 420325405 is 504523024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50993881 + 369331524 = 7141^2 + 19218^2 .

It is not a de Polignac number, because 420325405 - 2³ = 420325397 is a prime.

It is a super-3 number, since 3×420325405³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420325405.

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 3 ways as a sum of consecutive naturals, for example, 42032536 + ... + 42032545.

It is an arithmetic number, because the mean of its divisors is an integer number (126097623).

Almost surely, 2^420325405 is an apocalyptic number.

It is an amenable number.

420325405 is a deficient number, since it is larger than the sum of its proper divisors (84065087).

420325405 is an equidigital number, since it uses as much as digits as its factorization.

420325405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84065086.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 420325405 is about 20501.8390638499. The cubic root of 420325405 is about 749.0805948676.

Adding to 420325405 its reverse (504523024), we get a palindrome (924848429).

The spelling of 420325405 in words is "four hundred twenty million, three hundred twenty-five thousand, four hundred five".