130505123 has 8 divisors (see below), whose sum is σ = 149313792. Its totient is φ = 111737736.

The previous prime is 130505117. The next prime is 130505131. The reversal of 130505123 is 321505031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130505123 - 2¹⁸ = 130242979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130505095 and 130505104.

It is not an unprimeable number, because it can be changed into a prime (130505113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 16472.

It is an arithmetic number, because the mean of its divisors is an integer number (18664224).

Almost surely, 2^130505123 is an apocalyptic number.

130505123 is a deficient number, since it is larger than the sum of its proper divisors (18808669).

130505123 is an equidigital number, since it uses as much as digits as its factorization.

130505123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20641.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 130505123 is about 11423.8838842138. The cubic root of 130505123 is about 507.2349694826.

The spelling of 130505123 in words is "one hundred thirty million, five hundred five thousand, one hundred twenty-three".