461022721 has 4 divisors (see below), whose sum is σ = 461329344. Its totient is φ = 460716100.

The previous prime is 461022719. The next prime is 461022733. The reversal of 461022721 is 127220164.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 461022721 - 2¹ = 461022719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461032721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151045 + ... + 154066.

It is an arithmetic number, because the mean of its divisors is an integer number (115332336).

Almost surely, 2^461022721 is an apocalyptic number.

It is an amenable number.

461022721 is a deficient number, since it is larger than the sum of its proper divisors (306623).

461022721 is a wasteful number, since it uses less digits than its factorization.

461022721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306622.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 461022721 is about 21471.4396582996. The cubic root of 461022721 is about 772.5159290536.

Adding to 461022721 its reverse (127220164), we get a palindrome (588242885).

The spelling of 461022721 in words is "four hundred sixty-one million, twenty-two thousand, seven hundred twenty-one".