420393565 has 8 divisors (see below), whose sum is σ = 507087288. Its totient is φ = 334571520.

The previous prime is 420393559. The next prime is 420393569. The reversal of 420393565 is 565393024.

It can be written as a sum of positive squares in 4 ways, for example, as 30173049 + 390220516 = 5493^2 + 19754^2 .

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

It is not a de Polignac number, because 420393565 - 2¹³ = 420385373 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 (420393569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216856 + ... + 218785.

It is an arithmetic number, because the mean of its divisors is an integer number (63385911).

Almost surely, 2^420393565 is an apocalyptic number.

It is an amenable number.

420393565 is a deficient number, since it is larger than the sum of its proper divisors (86693723).

420393565 is a wasteful number, since it uses less digits than its factorization.

420393565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435839.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 420393565 is about 20503.5012863657. The cubic root of 420393565 is about 749.1210830015.

The spelling of 420393565 in words is "four hundred twenty million, three hundred ninety-three thousand, five hundred sixty-five".