42761009 has 2 divisors, whose sum is σ = 42761010. Its totient is φ = 42761008.

The previous prime is 42760999. The next prime is 42761053. The reversal of 42761009 is 90016724.

42761009 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 can be written as a sum of positive squares in only one way, i.e., 41886784 + 874225 = 6472^2 + 935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42761009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42761309) 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, 21380504 + 21380505.

It is an arithmetic number, because the mean of its divisors is an integer number (21380505).

Almost surely, 2^42761009 is an apocalyptic number.

It is an amenable number.

42761009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42761009 is an equidigital number, since it uses as much as digits as its factorization.

42761009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 42761009 is about 6539.1902403891. The cubic root of 42761009 is about 349.6895451118.

The spelling of 42761009 in words is "forty-two million, seven hundred sixty-one thousand, nine".