540161 has 4 divisors (see below), whose sum is σ = 541632. Its totient is φ = 538692.

The previous prime is 540157. The next prime is 540167. The reversal of 540161 is 161045.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 540161 - 2² = 540157 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 540161.

It is not an unprimeable number, because it can be changed into a prime (540167) 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, 356 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (135408).

2⁵⁴⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

540161 is a deficient number, since it is larger than the sum of its proper divisors (1471).

540161 is an equidigital number, since it uses as much as digits as its factorization.

540161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 540161 is about 734.9564612955. The cubic root of 540161 is about 81.4406206795.

The spelling of 540161 in words is "five hundred forty thousand, one hundred sixty-one".