102442105 has 4 divisors (see below), whose sum is σ = 122930532. Its totient is φ = 81953680.

The previous prime is 102442103. The next prime is 102442127. The reversal of 102442105 is 501244201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75568249 + 26873856 = 8693^2 + 5184^2 .

It is not a de Polignac number, because 102442105 - 2¹ = 102442103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102442103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10244206 + ... + 10244215.

It is an arithmetic number, because the mean of its divisors is an integer number (30732633).

Almost surely, 2^102442105 is an apocalyptic number.

It is an amenable number.

102442105 is a deficient number, since it is larger than the sum of its proper divisors (20488427).

102442105 is an equidigital number, since it uses as much as digits as its factorization.

102442105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20488426.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102442105 is about 10121.3687315501. The cubic root of 102442105 is about 467.9069521226.

Adding to 102442105 its reverse (501244201), we get a palindrome (603686306).

The spelling of 102442105 in words is "one hundred two million, four hundred forty-two thousand, one hundred five".