102130906 has 12 divisors (see below), whose sum is σ = 156531978. Its totient is φ = 49976792.

The previous prime is 102130867. The next prime is 102130927. The reversal of 102130906 is 609031201.

It can be written as a sum of positive squares in only one way, i.e., 102111025 + 19881 = 10105^2 + 141^2 .

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 5 ways as a sum of consecutive naturals, for example, 7141 + ... + 15976.

Almost surely, 2^102130906 is an apocalyptic number.

102130906 is a deficient number, since it is larger than the sum of its proper divisors (54401072).

102130906 is an equidigital number, since it uses as much as digits as its factorization.

102130906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23213 (or 23166 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 102130906 is about 10105.9836730523. The cubic root of 102130906 is about 467.4326683893.

The spelling of 102130906 in words is "one hundred two million, one hundred thirty thousand, nine hundred six".