539961 has 8 divisors (see below), whose sum is σ = 757920. Its totient is φ = 340992.

The previous prime is 539947. The next prime is 539993. The reversal of 539961 is 169935.

539961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 539961 - 2⁶ = 539897 is a prime.

It is a d-powerful number, because it can be written as 5 + 3¹² + 9 + 9³ + 6⁵ + 1 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 539961.

It is not an unprimeable number, because it can be changed into a prime (539921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4680 + ... + 4793.

It is an arithmetic number, because the mean of its divisors is an integer number (94740).

2⁵³⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

539961 is a deficient number, since it is larger than the sum of its proper divisors (217959).

539961 is a wasteful number, since it uses less digits than its factorization.

539961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9495.

The product of its digits is 7290, while the sum is 33.

The square root of 539961 is about 734.8203862169. The cubic root of 539961 is about 81.4305680379.

It can be divided in two parts, 5399 and 61, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 539961 in words is "five hundred thirty-nine thousand, nine hundred sixty-one".