578461 has 4 divisors (see below), whose sum is σ = 622972. Its totient is φ = 533952.

The previous prime is 578453. The next prime is 578467. The reversal of 578461 is 164875.

It is the 311-st star number.

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 225625 + 352836 = 475^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 578461 - 2³ = 578453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (578467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22236 + ... + 22261.

It is an arithmetic number, because the mean of its divisors is an integer number (155743).

2⁵⁷⁸⁴⁶¹ is an apocalyptic number.

It is an amenable number.

578461 is a deficient number, since it is larger than the sum of its proper divisors (44511).

578461 is a wasteful number, since it uses less digits than its factorization.

578461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44510.

The product of its digits is 6720, while the sum is 31.

The square root of 578461 is about 760.5662364318. The cubic root of 578461 is about 83.3216819266.

The spelling of 578461 in words is "five hundred seventy-eight thousand, four hundred sixty-one".