40012523 has 4 divisors (see below), whose sum is σ = 40668528. Its totient is φ = 39356520.

The previous prime is 40012519. The next prime is 40012573. The reversal of 40012523 is 32521004.

40012523 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 is a cyclic number.

It is not a de Polignac number, because 40012523 - 2² = 40012519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40012573) 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, 327911 + ... + 328032.

It is an arithmetic number, because the mean of its divisors is an integer number (10167132).

Almost surely, 2^40012523 is an apocalyptic number.

40012523 is a deficient number, since it is larger than the sum of its proper divisors (656005).

40012523 is an equidigital number, since it uses as much as digits as its factorization.

40012523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656004.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40012523 is about 6325.5452729389. The cubic root of 40012523 is about 342.0308756594.

Adding to 40012523 its reverse (32521004), we get a palindrome (72533527).

The spelling of 40012523 in words is "forty million, twelve thousand, five hundred twenty-three".