409287 has 4 divisors (see below), whose sum is σ = 545720. Its totient is φ = 272856.

The previous prime is 409271. The next prime is 409289. The reversal of 409287 is 782904.

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

It is not a de Polignac number, because 409287 - 2⁴ = 409271 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68212 + ... + 68217.

It is an arithmetic number, because the mean of its divisors is an integer number (136430).

2⁴⁰⁹²⁸⁷ is an apocalyptic number.

409287 is a deficient number, since it is larger than the sum of its proper divisors (136433).

409287 is a wasteful number, since it uses less digits than its factorization.

409287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136432.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 409287 is about 639.7554220169. The cubic root of 409287 is about 74.2464996253.

It can be divided in two parts, 409 and 287, that added together give a palindrome (696).

The spelling of 409287 in words is "four hundred nine thousand, two hundred eighty-seven".