408245 has 4 divisors (see below), whose sum is σ = 489900. Its totient is φ = 326592.

The previous prime is 408241. The next prime is 408251. The reversal of 408245 is 542804.

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 253009 + 155236 = 503^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 408245 - 2² = 408241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40820 + ... + 40829.

It is an arithmetic number, because the mean of its divisors is an integer number (122475).

2⁴⁰⁸²⁴⁵ is an apocalyptic number.

It is an amenable number.

408245 is a deficient number, since it is larger than the sum of its proper divisors (81655).

408245 is an equidigital number, since it uses as much as digits as its factorization.

408245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81654.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 408245 is about 638.9405293140. The cubic root of 408245 is about 74.1834382528.

The spelling of 408245 in words is "four hundred eight thousand, two hundred forty-five".