420145005 has 32 divisors (see below), whose sum is σ = 808704000. Its totient is φ = 181956672.

The previous prime is 420144997. The next prime is 420145009. The reversal of 420145005 is 500541024.

It is not a de Polignac number, because 420145005 - 2³ = 420144997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420145009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103305 + ... + 107294.

It is an arithmetic number, because the mean of its divisors is an integer number (25272000).

Almost surely, 2^420145005 is an apocalyptic number.

It is an amenable number.

420145005 is a deficient number, since it is larger than the sum of its proper divisors (388558995).

420145005 is a wasteful number, since it uses less digits than its factorization.

420145005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210633.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 420145005 is about 20497.4389863710. The cubic root of 420145005 is about 748.9734132451.

Adding to 420145005 its reverse (500541024), we get a palindrome (920686029).

The spelling of 420145005 in words is "four hundred twenty million, one hundred forty-five thousand, five".