102130805 has 32 divisors (see below), whose sum is σ = 145305600. Its totient is φ = 67459392.

The previous prime is 102130789. The next prime is 102130823. The reversal of 102130805 is 508031201.

102130805 = 123² + 124² + ... + 675².

It is not a de Polignac number, because 102130805 - 2⁴ = 102130789 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 118466 + ... + 119324.

It is an arithmetic number, because the mean of its divisors is an integer number (4540800).

Almost surely, 2^102130805 is an apocalyptic number.

It is an amenable number.

102130805 is a deficient number, since it is larger than the sum of its proper divisors (43174795).

102130805 is an equidigital number, since it uses as much as digits as its factorization.

102130805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 102130805 is about 10105.9786760115. The cubic root of 102130805 is about 467.4325143037.

The spelling of 102130805 in words is "one hundred two million, one hundred thirty thousand, eight hundred five".