495781 has 8 divisors (see below), whose sum is σ = 582624. Its totient is φ = 415920.

The previous prime is 495773. The next prime is 495787. The reversal of 495781 is 187594.

It is a happy number.

495781 is nontrivially palindromic in base 12.

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

It is a cyclic number.

It is not a de Polignac number, because 495781 - 2³ = 495773 is a prime.

It is a super-2 number, since 2×495781² = 491597599922, which contains 22 as substring.

It is a Duffinian number.

495781 is a lucky number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495787) 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, 1591 + ... + 1876.

It is an arithmetic number, because the mean of its divisors is an integer number (72828).

2⁴⁹⁵⁷⁸¹ is an apocalyptic number.

It is an amenable number.

495781 is a deficient number, since it is larger than the sum of its proper divisors (86843).

495781 is a wasteful number, since it uses less digits than its factorization.

495781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491.

The product of its digits is 10080, while the sum is 34.

The square root of 495781 is about 704.1171777481. The cubic root of 495781 is about 79.1461802331.

The spelling of 495781 in words is "four hundred ninety-five thousand, seven hundred eighty-one".