541665 has 12 divisors (see below), whose sum is σ = 938964. Its totient is φ = 288864.

The previous prime is 541661. The next prime is 541669. The reversal of 541665 is 566145.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (541661) and next prime (541669).

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 471969 = 264^2 + 687^2 .

It is not a de Polignac number, because 541665 - 2² = 541661 is a prime.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 541665.

It is not an unprimeable number, because it can be changed into a prime (541661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5974 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (78247).

2⁵⁴¹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

541665 is a deficient number, since it is larger than the sum of its proper divisors (397299).

541665 is a wasteful number, since it uses less digits than its factorization.

541665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048 (or 12045 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 541665 is about 735.9789399161. The cubic root of 541665 is about 81.5161371687.

The spelling of 541665 in words is "five hundred forty-one thousand, six hundred sixty-five".