42262009 has 2 divisors, whose sum is σ = 42262010. Its totient is φ = 42262008.

The previous prime is 42261979. The next prime is 42262013. The reversal of 42262009 is 90026224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21650409 + 20611600 = 4653^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 42262009 - 2¹¹ = 42259961 is a prime.

It is not a weakly prime, because it can be changed into another prime (42262039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21131004 + 21131005.

It is an arithmetic number, because the mean of its divisors is an integer number (21131005).

Almost surely, 2^42262009 is an apocalyptic number.

It is an amenable number.

42262009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42262009 is an equidigital number, since it uses as much as digits as its factorization.

42262009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 42262009 is about 6500.9237035978. The cubic root of 42262009 is about 348.3239842936.

The spelling of 42262009 in words is "forty-two million, two hundred sixty-two thousand, nine".