416721 has 8 divisors (see below), whose sum is σ = 588384. Its totient is φ = 261440.

The previous prime is 416719. The next prime is 416761. The reversal of 416721 is 127614.

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

It is a cyclic number.

It is not a de Polignac number, because 416721 - 2¹ = 416719 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416761) 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 7 ways as a sum of consecutive naturals, for example, 4035 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (73548).

2⁴¹⁶⁷²¹ is an apocalyptic number.

It is an amenable number.

416721 is a deficient number, since it is larger than the sum of its proper divisors (171663).

416721 is a wasteful number, since it uses less digits than its factorization.

416721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8191.

The product of its digits is 336, while the sum is 21.

The square root of 416721 is about 645.5393094150. The cubic root of 416721 is about 74.6933254970.

The spelling of 416721 in words is "four hundred sixteen thousand, seven hundred twenty-one".