40045205 has 16 divisors (see below), whose sum is σ = 48840960. Its totient is φ = 31516992.

The previous prime is 40045199. The next prime is 40045241. The reversal of 40045205 is 50254004.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40045205 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 108932 + ... + 109298.

It is an arithmetic number, because the mean of its divisors is an integer number (3052560).

Almost surely, 2^40045205 is an apocalyptic number.

It is an amenable number.

40045205 is a deficient number, since it is larger than the sum of its proper divisors (8795755).

40045205 is a wasteful number, since it uses less digits than its factorization.

40045205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40045205 is about 6328.1280802462. The cubic root of 40045205 is about 342.1239732713.

Adding to 40045205 its reverse (50254004), we get a palindrome (90299209).

The spelling of 40045205 in words is "forty million, forty-five thousand, two hundred five".