42074909 has 2 divisors, whose sum is σ = 42074910. Its totient is φ = 42074908.

The previous prime is 42074899. The next prime is 42074939. The reversal of 42074909 is 90947024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35366809 + 6708100 = 5947^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 42074909 - 2²⁰ = 41026333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42074939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21037454 + 21037455.

It is an arithmetic number, because the mean of its divisors is an integer number (21037455).

Almost surely, 2^42074909 is an apocalyptic number.

It is an amenable number.

42074909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42074909 is an equidigital number, since it uses as much as digits as its factorization.

42074909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 42074909 is about 6486.5174785859. The cubic root of 42074909 is about 347.8091970519.

The spelling of 42074909 in words is "forty-two million, seventy-four thousand, nine hundred nine".