461721 has 8 divisors (see below), whose sum is σ = 663040. Its totient is φ = 284112.

The previous prime is 461717. The next prime is 461801. The reversal of 461721 is 127164.

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

It is not a de Polignac number, because 461721 - 2² = 461717 is a prime.

It is the 680-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461521) by changing a digit.

It is a nontrivial repunit in base 679.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (82880).

2⁴⁶¹⁷²¹ is an apocalyptic number.

It is an amenable number.

461721 is a deficient number, since it is larger than the sum of its proper divisors (201319).

461721 is a wasteful number, since it uses less digits than its factorization.

461721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855.

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

The square root of 461721 is about 679.5005518762. The cubic root of 461721 is about 77.2905757659.

Adding to 461721 its reverse (127164), we get a palindrome (588885).

The spelling of 461721 in words is "four hundred sixty-one thousand, seven hundred twenty-one".