409281 has 8 divisors (see below), whose sum is σ = 549024. Its totient is φ = 271200.

The previous prime is 409271. The next prime is 409289. The reversal of 409281 is 182904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 409281 - 2⁶ = 409217 is a prime.

It is a super-2 number, since 2×409281² = 335021873922, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 381 + ... + 981.

It is an arithmetic number, because the mean of its divisors is an integer number (68628).

2⁴⁰⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

409281 is a deficient number, since it is larger than the sum of its proper divisors (139743).

409281 is a wasteful number, since it uses less digits than its factorization.

409281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 409281 is about 639.7507327077. The cubic root of 409281 is about 74.2461368145.

The spelling of 409281 in words is "four hundred nine thousand, two hundred eighty-one".