40942481 has 2 divisors, whose sum is σ = 40942482. Its totient is φ = 40942480.

The previous prime is 40942469. The next prime is 40942483. The reversal of 40942481 is 18424904.

40942481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 1050625 = 6316^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 40942481 - 2⁶ = 40942417 is a prime.

It is a super-2 number, since 2×40942481² = 3352573500870722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 40942483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_2487461 and since 40942481 and 2487461 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40942483) 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, 20471240 + 20471241.

It is an arithmetic number, because the mean of its divisors is an integer number (20471241).

Almost surely, 2^40942481 is an apocalyptic number.

It is an amenable number.

40942481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40942481 is an equidigital number, since it uses as much as digits as its factorization.

40942481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 40942481 is about 6398.6311817450. The cubic root of 40942481 is about 344.6603981607.

The spelling of 40942481 in words is "forty million, nine hundred forty-two thousand, four hundred eighty-one".