42475109 has 2 divisors, whose sum is σ = 42475110. Its totient is φ = 42475108.

The previous prime is 42475091. The next prime is 42475141. The reversal of 42475109 is 90157424.

It is a happy number.

Together with previous prime (42475091) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (42475141) can be obtained adding 42475109 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34550884 + 7924225 = 5878^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 42475109 - 2¹⁶ = 42409573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42475159) 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, 21237554 + 21237555.

It is an arithmetic number, because the mean of its divisors is an integer number (21237555).

Almost surely, 2^42475109 is an apocalyptic number.

It is an amenable number.

42475109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42475109 is an equidigital number, since it uses as much as digits as its factorization.

42475109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 42475109 is about 6517.2930730480. The cubic root of 42475109 is about 348.9084605968.

The spelling of 42475109 in words is "forty-two million, four hundred seventy-five thousand, one hundred nine".