420601565 has 8 divisors (see below), whose sum is σ = 504902328. Its totient is φ = 336360960.

The previous prime is 420601561. The next prime is 420601567. The reversal of 420601565 is 565106024.

It can be written as a sum of positive squares in 4 ways, for example, as 597529 + 420004036 = 773^2 + 20494^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420601565 - 2² = 420601561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420601561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2129 + ... + 29081.

It is an arithmetic number, because the mean of its divisors is an integer number (63112791).

Almost surely, 2^420601565 is an apocalyptic number.

It is an amenable number.

420601565 is a deficient number, since it is larger than the sum of its proper divisors (84300763).

420601565 is a wasteful number, since it uses less digits than its factorization.

420601565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30079.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 420601565 is about 20508.5729635194. The cubic root of 420601565 is about 749.2446112911.

Adding to 420601565 its reverse (565106024), we get a palindrome (985707589).

The spelling of 420601565 in words is "four hundred twenty million, six hundred one thousand, five hundred sixty-five".