409495 has 4 divisors (see below), whose sum is σ = 491400. Its totient is φ = 327592.

The previous prime is 409483. The next prime is 409499. The reversal of 409495 is 594904.

409495 = T₁₅₀ + T₁₅₁ + ... + T₁₇₉.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409495 - 2⁵ = 409463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40945 + ... + 40954.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

2⁴⁰⁹⁴⁹⁵ is an apocalyptic number.

409495 is a deficient number, since it is larger than the sum of its proper divisors (81905).

409495 is an equidigital number, since it uses as much as digits as its factorization.

409495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81904.

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

The square root of 409495 is about 639.9179634922. The cubic root of 409495 is about 74.2590748732.

The spelling of 409495 in words is "four hundred nine thousand, four hundred ninety-five".