42945029 has 2 divisors, whose sum is σ = 42945030. Its totient is φ = 42945028.

The previous prime is 42945017. The next prime is 42945047. The reversal of 42945029 is 92054924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 20948929 = 4690^2 + 4577^2 .

It is a cyclic number.

It is not a de Polignac number, because 42945029 - 2⁸ = 42944773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42945029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42945059) 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, 21472514 + 21472515.

It is an arithmetic number, because the mean of its divisors is an integer number (21472515).

Almost surely, 2^42945029 is an apocalyptic number.

It is an amenable number.

42945029 is a deficient number, since it is larger than the sum of its proper divisors (1).

42945029 is an equidigital number, since it uses as much as digits as its factorization.

42945029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 42945029 is about 6553.2456843918. The cubic root of 42945029 is about 350.1904514497.

The spelling of 42945029 in words is "forty-two million, nine hundred forty-five thousand, twenty-nine".