40642505 has 4 divisors (see below), whose sum is σ = 48771012. Its totient is φ = 32514000.

The previous prime is 40642499. The next prime is 40642517. The reversal of 40642505 is 50524604.

40642505 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 7557001 + 33085504 = 2749^2 + 5752^2 .

It is not a de Polignac number, because 40642505 - 2⁴ = 40642489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 4064246 + ... + 4064255.

It is an arithmetic number, because the mean of its divisors is an integer number (12192753).

Almost surely, 2^40642505 is an apocalyptic number.

It is an amenable number.

40642505 is a deficient number, since it is larger than the sum of its proper divisors (8128507).

40642505 is an equidigital number, since it uses as much as digits as its factorization.

40642505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128506.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 40642505 is about 6375.1474492752. The cubic root of 40642505 is about 343.8165852282.

The spelling of 40642505 in words is "forty million, six hundred forty-two thousand, five hundred five".