541509 has 4 divisors (see below), whose sum is σ = 722016. Its totient is φ = 361004.

The previous prime is 541507. The next prime is 541511. The reversal of 541509 is 905145.

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 an interprime number because it is at equal distance from previous prime (541507) and next prime (541511).

It is a cyclic number.

It is not a de Polignac number, because 541509 - 2¹ = 541507 is a prime.

It is a D-number.

541509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90249 + ... + 90254.

It is an arithmetic number, because the mean of its divisors is an integer number (180504).

2⁵⁴¹⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

541509 is a deficient number, since it is larger than the sum of its proper divisors (180507).

541509 is a wasteful number, since it uses less digits than its factorization.

541509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180506.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 541509 is about 735.8729509909. The cubic root of 541509 is about 81.5083108441.

It can be divided in two parts, 5 and 41509, that added together give a palindrome (41514).

The spelling of 541509 in words is "five hundred forty-one thousand, five hundred nine".