495409 has 4 divisors (see below), whose sum is σ = 501760. Its totient is φ = 489060.

The previous prime is 495401. The next prime is 495413. The reversal of 495409 is 904594.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904594 = 2 ⋅452297.

It is a cyclic number.

It is not a de Polignac number, because 495409 - 2³ = 495401 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495401) 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, 3057 + ... + 3214.

It is an arithmetic number, because the mean of its divisors is an integer number (125440).

2⁴⁹⁵⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

495409 is a deficient number, since it is larger than the sum of its proper divisors (6351).

495409 is an equidigital number, since it uses as much as digits as its factorization.

495409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 495409 is about 703.8529676005. The cubic root of 495409 is about 79.1263799947.

The spelling of 495409 in words is "four hundred ninety-five thousand, four hundred nine".