421020715 has 16 divisors (see below), whose sum is σ = 532444320. Its totient is φ = 318712320.

The previous prime is 421020713. The next prime is 421020731. The reversal of 421020715 is 517020124.

It is a happy number.

It is not a de Polignac number, because 421020715 - 2¹ = 421020713 is a prime.

It is a super-2 number, since 2×421020715² = 354516884918222450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421020713) 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 15 ways as a sum of consecutive naturals, for example, 98707 + ... + 102883.

It is an arithmetic number, because the mean of its divisors is an integer number (33277770).

Almost surely, 2^421020715 is an apocalyptic number.

421020715 is a deficient number, since it is larger than the sum of its proper divisors (111423605).

421020715 is a wasteful number, since it uses less digits than its factorization.

421020715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 421020715 is about 20518.7893161366. The cubic root of 421020715 is about 749.4934149428.

Adding to 421020715 its reverse (517020124), we get a palindrome (938040839).

The spelling of 421020715 in words is "four hundred twenty-one million, twenty thousand, seven hundred fifteen".