102026665 has 16 divisors (see below), whose sum is σ = 133163856. Its totient is φ = 74592000.

The previous prime is 102026657. The next prime is 102026677. The reversal of 102026665 is 566620201.

It can be written as a sum of positive squares in 8 ways, for example, as 3143529 + 98883136 = 1773^2 + 9944^2 .

It is not a de Polignac number, because 102026665 - 2³ = 102026657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1206 + ... + 14335.

It is an arithmetic number, because the mean of its divisors is an integer number (8322741).

Almost surely, 2^102026665 is an apocalyptic number.

It is an amenable number.

102026665 is a deficient number, since it is larger than the sum of its proper divisors (31137191).

102026665 is a wasteful number, since it uses less digits than its factorization.

102026665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15660.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 102026665 is about 10100.8249663084. The cubic root of 102026665 is about 467.2735842050.

Adding to 102026665 its reverse (566620201), we get a palindrome (668646866).

The spelling of 102026665 in words is "one hundred two million, twenty-six thousand, six hundred sixty-five".