420791565 has 64 divisors (see below), whose sum is σ = 740952576. Its totient is φ = 203046912.

The previous prime is 420791563. The next prime is 420791587. The reversal of 420791565 is 565197024.

It is not a de Polignac number, because 420791565 - 2¹ = 420791563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420791561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 971589 + ... + 972021.

It is an arithmetic number, because the mean of its divisors is an integer number (11577384).

Almost surely, 2^420791565 is an apocalyptic number.

It is an amenable number.

420791565 is a deficient number, since it is larger than the sum of its proper divisors (320161011).

420791565 is a wasteful number, since it uses less digits than its factorization.

420791565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 420791565 is about 20513.2046496885. The cubic root of 420791565 is about 749.3574140461.

The spelling of 420791565 in words is "four hundred twenty million, seven hundred ninety-one thousand, five hundred sixty-five".