102005650 has 12 divisors (see below), whose sum is σ = 189730602. Its totient is φ = 40802240.

The previous prime is 102005641. The next prime is 102005653. The reversal of 102005650 is 56500201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 87965641 + 14040009 = 9379^2 + 3747^2 .

It is not an unprimeable number, because it can be changed into a prime (102005653) 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 5 ways as a sum of consecutive naturals, for example, 1020007 + ... + 1020106.

Almost surely, 2^102005650 is an apocalyptic number.

102005650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102005650 is a deficient number, since it is larger than the sum of its proper divisors (87724952).

102005650 is a wasteful number, since it uses less digits than its factorization.

102005650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040125 (or 2040120 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 102005650 is about 10099.7846511695. The cubic root of 102005650 is about 467.2414996884.

Adding to 102005650 its reverse (56500201), we get a palindrome (158505851).

The spelling of 102005650 in words is "one hundred two million, five thousand, six hundred fifty".