421106717 has 4 divisors (see below), whose sum is σ = 421837116. Its totient is φ = 420376320.

The previous prime is 421106689. The next prime is 421106723. The reversal of 421106717 is 717601124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 362293156 + 58813561 = 19034^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 421106717 - 2⁸ = 421106461 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 421106717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421106737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364334 + ... + 365487.

It is an arithmetic number, because the mean of its divisors is an integer number (105459279).

Almost surely, 2^421106717 is an apocalyptic number.

It is an amenable number.

421106717 is a deficient number, since it is larger than the sum of its proper divisors (730399).

421106717 is an equidigital number, since it uses as much as digits as its factorization.

421106717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730398.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 421106717 is about 20520.8848980740. The cubic root of 421106717 is about 749.5444445335.

The spelling of 421106717 in words is "four hundred twenty-one million, one hundred six thousand, seven hundred seventeen".