40422521 has 2 divisors, whose sum is σ = 40422522. Its totient is φ = 40422520.

The previous prime is 40422497. The next prime is 40422553. The reversal of 40422521 is 12522404.

It is a happy number.

40422521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29106025 + 11316496 = 5395^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 40422521 - 2⁶ = 40422457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40422493 and 40422502.

It is not a weakly prime, because it can be changed into another prime (40422121) 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 as a sum of consecutive naturals, namely, 20211260 + 20211261.

It is an arithmetic number, because the mean of its divisors is an integer number (20211261).

Almost surely, 2^40422521 is an apocalyptic number.

It is an amenable number.

40422521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40422521 is an equidigital number, since it uses as much as digits as its factorization.

40422521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40422521 is about 6357.8707913892. The cubic root of 40422521 is about 343.1951420689.

Adding to 40422521 its reverse (12522404), we get a palindrome (52944925).

The spelling of 40422521 in words is "forty million, four hundred twenty-two thousand, five hundred twenty-one".