42050909 has 2 divisors, whose sum is σ = 42050910. Its totient is φ = 42050908.

The previous prime is 42050891. The next prime is 42050927. The reversal of 42050909 is 90905024.

It is a balanced prime because it is at equal distance from previous prime (42050891) and next prime (42050927).

It can be written as a sum of positive squares in only one way, i.e., 38402809 + 3648100 = 6197^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 42050909 - 2⁸ = 42050653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42050959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21025454 + 21025455.

It is an arithmetic number, because the mean of its divisors is an integer number (21025455).

Almost surely, 2^42050909 is an apocalyptic number.

It is an amenable number.

42050909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42050909 is an equidigital number, since it uses as much as digits as its factorization.

42050909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 42050909 is about 6484.6672235358. The cubic root of 42050909 is about 347.7430530516.

The spelling of 42050909 in words is "forty-two million, fifty thousand, nine hundred nine".