102020650 has 24 divisors (see below), whose sum is σ = 190823724. Its totient is φ = 40579200.

The previous prime is 102020647. The next prime is 102020687. The reversal of 102020650 is 56020201.

102020650 = T₁₂₆ + T₁₂₇ + ... + T₈₄₉.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3038049 + 98982601 = 1743^2 + 9949^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3414 + ... + 14686.

Almost surely, 2^102020650 is an apocalyptic number.

102020650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102020650 is a deficient number, since it is larger than the sum of its proper divisors (88803074).

102020650 is a wasteful number, since it uses less digits than its factorization.

102020650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11466 (or 11461 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 102020650 is about 10100.5272139626. The cubic root of 102020650 is about 467.2644012924.

Adding to 102020650 its reverse (56020201), we get a palindrome (158040851).

The spelling of 102020650 in words is "one hundred two million, twenty thousand, six hundred fifty".