461305721 has 8 divisors (see below), whose sum is σ = 464944704. Its totient is φ = 457675920.

The previous prime is 461305717. The next prime is 461305723. The reversal of 461305721 is 127503164.

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 461305721 - 2² = 461305717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461305723) 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, 125516 + ... + 129138.

It is an arithmetic number, because the mean of its divisors is an integer number (58118088).

Almost surely, 2^461305721 is an apocalyptic number.

It is an amenable number.

461305721 is a deficient number, since it is larger than the sum of its proper divisors (3638983).

461305721 is a wasteful number, since it uses less digits than its factorization.

461305721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 461305721 is about 21478.0287968892. The cubic root of 461305721 is about 772.6739670268.

Adding to 461305721 its reverse (127503164), we get a palindrome (588808885).

The spelling of 461305721 in words is "four hundred sixty-one million, three hundred five thousand, seven hundred twenty-one".