581461 has 4 divisors (see below), whose sum is σ = 583072. Its totient is φ = 579852.

The previous prime is 581459. The next prime is 581473. The reversal of 581461 is 164185.

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 581461 - 2¹ = 581459 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581411) 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, 16 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (145768).

2⁵⁸¹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

581461 is a deficient number, since it is larger than the sum of its proper divisors (1611).

581461 is a wasteful number, since it uses less digits than its factorization.

581461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its digits is 960, while the sum is 25.

The square root of 581461 is about 762.5359007942. The cubic root of 581461 is about 83.4654739112.

The spelling of 581461 in words is "five hundred eighty-one thousand, four hundred sixty-one".