475409 has 6 divisors (see below), whose sum is σ = 522690. Its totient is φ = 432080.

The previous prime is 475403. The next prime is 475417. The reversal of 475409 is 904574.

It can be written as a sum of positive squares in only one way, i.e., 327184 + 148225 = 572^2 + 385^2 .

It is not a de Polignac number, because 475409 - 2¹² = 471313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (475403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1844 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (87115).

2⁴⁷⁵⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

475409 is a deficient number, since it is larger than the sum of its proper divisors (47281).

475409 is a wasteful number, since it uses less digits than its factorization.

475409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951 (or 3940 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 475409 is about 689.4990935455. The cubic root of 475409 is about 78.0469255220.

The spelling of 475409 in words is "four hundred seventy-five thousand, four hundred nine".