420542215 has 4 divisors (see below), whose sum is σ = 504650664. Its totient is φ = 336433768.

The previous prime is 420542173. The next prime is 420542233. The reversal of 420542215 is 512245024.

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

It is a cyclic number.

It is not a de Polignac number, because 420542215 - 2¹⁵ = 420509447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420542215.

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, 42054217 + ... + 42054226.

It is an arithmetic number, because the mean of its divisors is an integer number (126162666).

Almost surely, 2^420542215 is an apocalyptic number.

420542215 is a deficient number, since it is larger than the sum of its proper divisors (84108449).

420542215 is an equidigital number, since it uses as much as digits as its factorization.

420542215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84108448.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420542215 is about 20507.1259566035. The cubic root of 420542215 is about 749.2093683097.

Adding to 420542215 its reverse (512245024), we get a palindrome (932787239).

The spelling of 420542215 in words is "four hundred twenty million, five hundred forty-two thousand, two hundred fifteen".