40278041 has 2 divisors, whose sum is σ = 40278042. Its totient is φ = 40278040.

The previous prime is 40278023. The next prime is 40278053. The reversal of 40278041 is 14087204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 6869641 = 5780^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 40278041 - 2²² = 36083737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40278041.

It is not a weakly prime, because it can be changed into another prime (40278241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20139020 + 20139021.

It is an arithmetic number, because the mean of its divisors is an integer number (20139021).

Almost surely, 2^40278041 is an apocalyptic number.

It is an amenable number.

40278041 is a deficient number, since it is larger than the sum of its proper divisors (1).

40278041 is an equidigital number, since it uses as much as digits as its factorization.

40278041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40278041 is about 6346.4983258487. The cubic root of 40278041 is about 342.7857660858.

The spelling of 40278041 in words is "forty million, two hundred seventy-eight thousand, forty-one".