495561 has 8 divisors (see below), whose sum is σ = 720864. Its totient is φ = 300320.

The previous prime is 495559. The next prime is 495563. The reversal of 495561 is 165594.

It is an interprime number because it is at equal distance from previous prime (495559) and next prime (495563).

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 495561 - 2¹ = 495559 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (495563) 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, 7476 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (90108).

2⁴⁹⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

495561 is a deficient number, since it is larger than the sum of its proper divisors (225303).

495561 is a wasteful number, since it uses less digits than its factorization.

495561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031.

The product of its digits is 5400, while the sum is 30.

The square root of 495561 is about 703.9609364162. The cubic root of 495561 is about 79.1344716119.

The spelling of 495561 in words is "four hundred ninety-five thousand, five hundred sixty-one".