409455 has 24 divisors (see below), whose sum is σ = 738192. Its totient is φ = 217728.

The previous prime is 409441. The next prime is 409463. The reversal of 409455 is 554904.

It is not a de Polignac number, because 409455 - 2⁶ = 409391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1047 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (30758).

2⁴⁰⁹⁴⁵⁵ is an apocalyptic number.

409455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

409455 is the 405-th heptagonal number.

409455 is a deficient number, since it is larger than the sum of its proper divisors (328737).

409455 is an equidigital number, since it uses as much as digits as its factorization.

409455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 409455 is about 639.8867087227. The cubic root of 409455 is about 74.2566568871.

The spelling of 409455 in words is "four hundred nine thousand, four hundred fifty-five".