495581 has 8 divisors (see below), whose sum is σ = 535680. Its totient is φ = 457072.

The previous prime is 495571. The next prime is 495587. The reversal of 495581 is 185594.

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 495581 - 2¹⁸ = 233437 is a prime.

It is a super-2 number, since 2×495581² = 491201055122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495587) 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, 296 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2⁴⁹⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

495581 is a deficient number, since it is larger than the sum of its proper divisors (40099).

495581 is a wasteful number, since it uses less digits than its factorization.

495581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its digits is 7200, while the sum is 32.

The square root of 495581 is about 703.9751416066. The cubic root of 495581 is about 79.1355361751.

The spelling of 495581 in words is "four hundred ninety-five thousand, five hundred eighty-one".