461220581 has 4 divisors (see below), whose sum is σ = 461304012. Its totient is φ = 461137152.

The previous prime is 461220533. The next prime is 461220593. The reversal of 461220581 is 185022164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170824900 + 290395681 = 13070^2 + 17041^2 .

It is a cyclic number.

It is not a de Polignac number, because 461220581 - 2²² = 457026277 is a prime.

It is a super-2 number, since 2×461220581² = 425448848675955122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461220181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32786 + ... + 44691.

It is an arithmetic number, because the mean of its divisors is an integer number (115326003).

Almost surely, 2^461220581 is an apocalyptic number.

It is an amenable number.

461220581 is a deficient number, since it is larger than the sum of its proper divisors (83431).

461220581 is an equidigital number, since it uses as much as digits as its factorization.

461220581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83430.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 461220581 is about 21476.0466799642. The cubic root of 461220581 is about 772.6264284090.

The spelling of 461220581 in words is "four hundred sixty-one million, two hundred twenty thousand, five hundred eighty-one".