409045 has 32 divisors (see below), whose sum is σ = 645120. Its totient is φ = 241920.

The previous prime is 409043. The next prime is 409063. The reversal of 409045 is 540904.

409045 is nontrivially palindromic in base 6 and base 12.

It is not a de Polignac number, because 409045 - 2¹ = 409043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13180 + ... + 13210.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2⁴⁰⁹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

409045 is a deficient number, since it is larger than the sum of its proper divisors (236075).

409045 is a wasteful number, since it uses less digits than its factorization.

409045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 409045 is about 639.5662592726. The cubic root of 409045 is about 74.2318634447.

Adding to 409045 its reverse (540904), we get a palindrome (949949).

The spelling of 409045 in words is "four hundred nine thousand, forty-five".