42059209 has 2 divisors, whose sum is σ = 42059210. Its totient is φ = 42059208.

The previous prime is 42059197. The next prime is 42059221. The reversal of 42059209 is 90295024.

It is a balanced prime because it is at equal distance from previous prime (42059197) and next prime (42059221).

It can be written as a sum of positive squares in only one way, i.e., 35283600 + 6775609 = 5940^2 + 2603^2 .

It is a cyclic number.

It is not a de Polignac number, because 42059209 - 2¹¹ = 42057161 is a prime.

It is equal to p_2550973 and since 42059209 and 2550973 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42059279) 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, 21029604 + 21029605.

It is an arithmetic number, because the mean of its divisors is an integer number (21029605).

Almost surely, 2^42059209 is an apocalyptic number.

It is an amenable number.

42059209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42059209 is an equidigital number, since it uses as much as digits as its factorization.

42059209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 42059209 is about 6485.3071631188. The cubic root of 42059209 is about 347.7659306978.

The spelling of 42059209 in words is "forty-two million, fifty-nine thousand, two hundred nine".