578161 has 4 divisors (see below), whose sum is σ = 581872. Its totient is φ = 574452.

The previous prime is 578131. The next prime is 578167. The reversal of 578161 is 161875.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-578161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (578167) 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, 1611 + ... + 1936.

It is an arithmetic number, because the mean of its divisors is an integer number (145468).

2⁵⁷⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

578161 is a deficient number, since it is larger than the sum of its proper divisors (3711).

578161 is a wasteful number, since it uses less digits than its factorization.

578161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710.

The product of its digits is 1680, while the sum is 28.

The square root of 578161 is about 760.3689893729. The cubic root of 578161 is about 83.3072754082.

The spelling of 578161 in words is "five hundred seventy-eight thousand, one hundred sixty-one".