408745 has 4 divisors (see below), whose sum is σ = 490500. Its totient is φ = 326992.

The previous prime is 408743. The next prime is 408763. The reversal of 408745 is 547804.

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 63001 + 345744 = 251^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 408745 - 2¹ = 408743 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (408743) 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, 40870 + ... + 40879.

It is an arithmetic number, because the mean of its divisors is an integer number (122625).

2⁴⁰⁸⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

408745 is a deficient number, since it is larger than the sum of its proper divisors (81755).

408745 is an equidigital number, since it uses as much as digits as its factorization.

408745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81754.

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

The square root of 408745 is about 639.3316823058. The cubic root of 408745 is about 74.2137114031.

The spelling of 408745 in words is "four hundred eight thousand, seven hundred forty-five".