420660355 has 4 divisors (see below), whose sum is σ = 504792432. Its totient is φ = 336528280.

The previous prime is 420660353. The next prime is 420660367. The reversal of 420660355 is 553066024.

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

It is not a de Polignac number, because 420660355 - 2¹ = 420660353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420660353) 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 3 ways as a sum of consecutive naturals, for example, 42066031 + ... + 42066040.

It is an arithmetic number, because the mean of its divisors is an integer number (126198108).

Almost surely, 2^420660355 is an apocalyptic number.

420660355 is a deficient number, since it is larger than the sum of its proper divisors (84132077).

420660355 is an equidigital number, since it uses as much as digits as its factorization.

420660355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84132076.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 420660355 is about 20510.0062164788. The cubic root of 420660355 is about 749.2795184671.

The spelling of 420660355 in words is "four hundred twenty million, six hundred sixty thousand, three hundred fifty-five".