407845 has 4 divisors (see below), whose sum is σ = 489420. Its totient is φ = 326272.

The previous prime is 407843. The next prime is 407857. The reversal of 407845 is 548704.

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 58564 + 349281 = 242^2 + 591^2 .

It is a cyclic number.

It is not a de Polignac number, because 407845 - 2¹ = 407843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40780 + ... + 40789.

It is an arithmetic number, because the mean of its divisors is an integer number (122355).

2⁴⁰⁷⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

407845 is a deficient number, since it is larger than the sum of its proper divisors (81575).

407845 is an equidigital number, since it uses as much as digits as its factorization.

407845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81574.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 407845 is about 638.6274344248. The cubic root of 407845 is about 74.1592019308.

The spelling of 407845 in words is "four hundred seven thousand, eight hundred forty-five".