40509265 has 8 divisors (see below), whose sum is σ = 49925160. Its totient is φ = 31531392.

The previous prime is 40509247. The next prime is 40509269. The reversal of 40509265 is 56290504.

40509265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7745089 + 32764176 = 2783^2 + 5724^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40509265 - 2⁹ = 40508753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40509269) 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 7 ways as a sum of consecutive naturals, for example, 109300 + ... + 109669.

It is an arithmetic number, because the mean of its divisors is an integer number (6240645).

Almost surely, 2^40509265 is an apocalyptic number.

It is an amenable number.

40509265 is a deficient number, since it is larger than the sum of its proper divisors (9415895).

40509265 is a wasteful number, since it uses less digits than its factorization.

40509265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219011.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 40509265 is about 6364.6889162001. The cubic root of 40509265 is about 343.4404578742.

Adding to 40509265 its reverse (56290504), we get a palindrome (96799769).

The spelling of 40509265 in words is "forty million, five hundred nine thousand, two hundred sixty-five".