420104045 has 4 divisors (see below), whose sum is σ = 504124860. Its totient is φ = 336083232.

The previous prime is 420104029. The next prime is 420104053. The reversal of 420104045 is 540401024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196392196 + 223711849 = 14014^2 + 14957^2 .

It is a cyclic number.

It is not a de Polignac number, because 420104045 - 2⁴ = 420104029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42010400 + ... + 42010409.

It is an arithmetic number, because the mean of its divisors is an integer number (126031215).

Almost surely, 2^420104045 is an apocalyptic number.

It is an amenable number.

420104045 is a deficient number, since it is larger than the sum of its proper divisors (84020815).

420104045 is an equidigital number, since it uses as much as digits as its factorization.

420104045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84020814.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 420104045 is about 20496.4398128065. The cubic root of 420104045 is about 748.9490732770.

Adding to 420104045 its reverse (540401024), we get a palindrome (960505069).

The spelling of 420104045 in words is "four hundred twenty million, one hundred four thousand, forty-five".