408145 has 4 divisors (see below), whose sum is σ = 489780. Its totient is φ = 326512.

The previous prime is 408137. The next prime is 408169. The reversal of 408145 is 541804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 173889 = 484^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 408145 - 2³ = 408137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40810 + ... + 40819.

It is an arithmetic number, because the mean of its divisors is an integer number (122445).

2⁴⁰⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

408145 is a deficient number, since it is larger than the sum of its proper divisors (81635).

408145 is an equidigital number, since it uses as much as digits as its factorization.

408145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81634.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 408145 is about 638.8622699769. The cubic root of 408145 is about 74.1773806570.

Adding to 408145 its reverse (541804), we get a palindrome (949949).

The spelling of 408145 in words is "four hundred eight thousand, one hundred forty-five".