40845251 has 2 divisors, whose sum is σ = 40845252. Its totient is φ = 40845250.

The previous prime is 40845239. The next prime is 40845281. The reversal of 40845251 is 15254804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40845251 - 2⁶ = 40845187 is a prime.

It is not a weakly prime, because it can be changed into another prime (40845281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20422625 + 20422626.

It is an arithmetic number, because the mean of its divisors is an integer number (20422626).

Almost surely, 2^40845251 is an apocalyptic number.

40845251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40845251 is an equidigital number, since it uses as much as digits as its factorization.

40845251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 40845251 is about 6391.0289468911. The cubic root of 40845251 is about 344.3873493024.

The spelling of 40845251 in words is "forty million, eight hundred forty-five thousand, two hundred fifty-one".