421716417 has 8 divisors (see below), whose sum is σ = 577485696. Its totient is φ = 273545712.

The previous prime is 421716403. The next prime is 421716439. The reversal of 421716417 is 714617124.

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

It is not a de Polignac number, because 421716417 - 2⁶ = 421716353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421716497) 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, 1899513 + ... + 1899734.

It is an arithmetic number, because the mean of its divisors is an integer number (72185712).

Almost surely, 2^421716417 is an apocalyptic number.

It is an amenable number.

421716417 is a deficient number, since it is larger than the sum of its proper divisors (155769279).

421716417 is a wasteful number, since it uses less digits than its factorization.

421716417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799287.

The product of its digits is 9408, while the sum is 33.

The square root of 421716417 is about 20535.7351219770. The cubic root of 421716417 is about 749.9060131113.

The spelling of 421716417 in words is "four hundred twenty-one million, seven hundred sixteen thousand, four hundred seventeen".