495861 has 4 divisors (see below), whose sum is σ = 661152. Its totient is φ = 330572.

The previous prime is 495851. The next prime is 495877. The reversal of 495861 is 168594.

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 495861 - 2⁵ = 495829 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 495861.

It is not an unprimeable number, because it can be changed into a prime (495821) 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, 82641 + ... + 82646.

It is an arithmetic number, because the mean of its divisors is an integer number (165288).

2⁴⁹⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

495861 is a deficient number, since it is larger than the sum of its proper divisors (165291).

495861 is a wasteful number, since it uses less digits than its factorization.

495861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165290.

The product of its digits is 8640, while the sum is 33.

The square root of 495861 is about 704.1739841829. The cubic root of 495861 is about 79.1504370547.

The spelling of 495861 in words is "four hundred ninety-five thousand, eight hundred sixty-one".