40242547 has 2 divisors, whose sum is σ = 40242548. Its totient is φ = 40242546.

The previous prime is 40242533. The next prime is 40242583. The reversal of 40242547 is 74524204.

It is a happy number.

40242547 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 a de Polignac number, because none of the positive numbers 2^k-40242547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40243547) 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, 20121273 + 20121274.

It is an arithmetic number, because the mean of its divisors is an integer number (20121274).

Almost surely, 2^40242547 is an apocalyptic number.

40242547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242547 is an equidigital number, since it uses as much as digits as its factorization.

40242547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 40242547 is about 6343.7013643456. The cubic root of 40242547 is about 342.6850460794.

It can be divided in two parts, 4024 and 2547, that multiplied together give a triangular number (10249128 = T₄₅₂₇).

The spelling of 40242547 in words is "forty million, two hundred forty-two thousand, five hundred forty-seven".