420520045 has 16 divisors (see below), whose sum is σ = 562215168. Its totient is φ = 299323840.

The previous prime is 420520043. The next prime is 420520049. The reversal of 420520045 is 540025024.

It is not a de Polignac number, because 420520045 - 2¹ = 420520043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420519998 and 420520025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420520043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78754 + ... + 83923.

It is an arithmetic number, because the mean of its divisors is an integer number (35138448).

Almost surely, 2^420520045 is an apocalyptic number.

It is an amenable number.

420520045 is a deficient number, since it is larger than the sum of its proper divisors (141695123).

420520045 is a wasteful number, since it uses less digits than its factorization.

420520045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162740.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 420520045 is about 20506.5854056691. The cubic root of 420520045 is about 749.1962025577.

Adding to 420520045 its reverse (540025024), we get a palindrome (960545069).

The spelling of 420520045 in words is "four hundred twenty million, five hundred twenty thousand, forty-five".