501161 has 4 divisors (see below), whose sum is σ = 511872. Its totient is φ = 490452.

The previous prime is 501157. The next prime is 501173. The reversal of 501161 is 161105.

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 501161 - 2² = 501157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501121) 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, 5285 + ... + 5378.

It is an arithmetic number, because the mean of its divisors is an integer number (127968).

2⁵⁰¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

501161 is a deficient number, since it is larger than the sum of its proper divisors (10711).

501161 is a wasteful number, since it uses less digits than its factorization.

501161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 501161 is about 707.9272561500. The cubic root of 501161 is about 79.4314375317.

Adding to 501161 its reverse (161105), we get a palindrome (662266).

The spelling of 501161 in words is "five hundred one thousand, one hundred sixty-one".