461221005 has 32 divisors (see below), whose sum is σ = 846950400. Its totient is φ = 209950272.

The previous prime is 461221003. The next prime is 461221009. The reversal of 461221005 is 500122164.

It is not a de Polignac number, because 461221005 - 2¹ = 461221003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461221003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15906 + ... + 34284.

It is an arithmetic number, because the mean of its divisors is an integer number (26467200).

Almost surely, 2^461221005 is an apocalyptic number.

It is an amenable number.

461221005 is a deficient number, since it is larger than the sum of its proper divisors (385729395).

461221005 is a wasteful number, since it uses less digits than its factorization.

461221005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18633.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 461221005 is about 21476.0565514249. The cubic root of 461221005 is about 772.6266651674.

Adding to 461221005 its reverse (500122164), we get a palindrome (961343169).

The spelling of 461221005 in words is "four hundred sixty-one million, two hundred twenty-one thousand, five".