421007715 has 24 divisors (see below), whose sum is σ = 733466448. Its totient is φ = 223392960.

The previous prime is 421007701. The next prime is 421007731. The reversal of 421007715 is 517700124.

It is not a de Polignac number, because 421007715 - 2¹² = 421003619 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14881 + ... + 32610.

It is an arithmetic number, because the mean of its divisors is an integer number (30561102).

Almost surely, 2^421007715 is an apocalyptic number.

421007715 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421007715 is a deficient number, since it is larger than the sum of its proper divisors (312458733).

421007715 is a wasteful number, since it uses less digits than its factorization.

421007715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47699 (or 47696 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 421007715 is about 20518.4725308684. The cubic root of 421007715 is about 749.4857007423.

Adding to 421007715 its reverse (517700124), we get a palindrome (938707839).

The spelling of 421007715 in words is "four hundred twenty-one million, seven thousand, seven hundred fifteen".