40052405 has 4 divisors (see below), whose sum is σ = 48062892. Its totient is φ = 32041920.

The previous prime is 40052401. The next prime is 40052423. The reversal of 40052405 is 50425004.

It is a happy number.

40052405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 29149201 + 10903204 = 5399^2 + 3302^2 .

It is not a de Polignac number, because 40052405 - 2² = 40052401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40052401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4005236 + ... + 4005245.

It is an arithmetic number, because the mean of its divisors is an integer number (12015723).

Almost surely, 2^40052405 is an apocalyptic number.

It is an amenable number.

40052405 is a deficient number, since it is larger than the sum of its proper divisors (8010487).

40052405 is an equidigital number, since it uses as much as digits as its factorization.

40052405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010486.

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

The square root of 40052405 is about 6328.6969432894. The cubic root of 40052405 is about 342.1444763086.

Adding to 40052405 its reverse (50425004), we get a palindrome (90477409).

The spelling of 40052405 in words is "forty million, fifty-two thousand, four hundred five".