40821259 has 2 divisors, whose sum is σ = 40821260. Its totient is φ = 40821258.

The previous prime is 40821257. The next prime is 40821307. The reversal of 40821259 is 95212804.

40821259 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 is a cyclic number.

It is not a de Polignac number, because 40821259 - 2¹ = 40821257 is a prime.

Together with 40821257, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40821259.

It is not a weakly prime, because it can be changed into another prime (40821257) 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, 20410629 + 20410630.

It is an arithmetic number, because the mean of its divisors is an integer number (20410630).

Almost surely, 2^40821259 is an apocalyptic number.

40821259 is a deficient number, since it is larger than the sum of its proper divisors (1).

40821259 is an equidigital number, since it uses as much as digits as its factorization.

40821259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40821259 is about 6389.1516651274. The cubic root of 40821259 is about 344.3199064591.

The spelling of 40821259 in words is "forty million, eight hundred twenty-one thousand, two hundred fifty-nine".