40605 has 8 divisors (see below), whose sum is σ = 64992. Its totient is φ = 21648.

The previous prime is 40597. The next prime is 40609. The reversal of 40605 is 50604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40605 - 2³ = 40597 is a prime.

It is a super-3 number, since 3×40605³ = 200844433335375, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 2707 = 40605 / (4 + 0 + 6 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339 + ... + 1368.

It is an arithmetic number, because the mean of its divisors is an integer number (8124).

2⁴⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

40605 is a deficient number, since it is larger than the sum of its proper divisors (24387).

40605 is a wasteful number, since it uses less digits than its factorization.

40605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 40605 is about 201.5068237058. The cubic root of 40605 is about 34.3710794427.

Subtracting 40605 from its reverse (50604), we obtain a palindrome (9999).

The spelling of 40605 in words is "forty thousand, six hundred five".