420920515 has 8 divisors (see below), whose sum is σ = 505772928. Its totient is φ = 336290880.

The previous prime is 420920501. The next prime is 420920519. The reversal of 420920515 is 515029024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-420920515 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420920519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51507 + ... + 59116.

It is an arithmetic number, because the mean of its divisors is an integer number (63221616).

Almost surely, 2^420920515 is an apocalyptic number.

420920515 is a deficient number, since it is larger than the sum of its proper divisors (84852413).

420920515 is a wasteful number, since it uses less digits than its factorization.

420920515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111389.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 420920515 is about 20516.3475063180. The cubic root of 420920515 is about 749.4339521532.

Adding to 420920515 its reverse (515029024), we get a palindrome (935949539).

The spelling of 420920515 in words is "four hundred twenty million, nine hundred twenty thousand, five hundred fifteen".