102642122 has 24 divisors (see below), whose sum is σ = 170170308. Its totient is φ = 46397120.

The previous prime is 102642121. The next prime is 102642143. The reversal of 102642122 is 221246201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 102191881 + 450241 = 10109^2 + 671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102642094 and 102642103.

It is not an unprimeable number, because it can be changed into a prime (102642121) 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 11 ways as a sum of consecutive naturals, for example, 46598 + ... + 48750.

Almost surely, 2^102642122 is an apocalyptic number.

102642122 is a deficient number, since it is larger than the sum of its proper divisors (67528186).

102642122 is a wasteful number, since it uses less digits than its factorization.

102642122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 102642122 is about 10131.2448396039. The cubic root of 102642122 is about 468.2112817409.

Adding to 102642122 its reverse (221246201), we get a palindrome (323888323).

The spelling of 102642122 in words is "one hundred two million, six hundred forty-two thousand, one hundred twenty-two".