130123665 has 120 divisors (see below), whose sum is σ = 278087040. Its totient is φ = 58024512.

The previous prime is 130123621. The next prime is 130123687. The reversal of 130123665 is 566321031.

It is not a de Polignac number, because 130123665 - 2⁶ = 130123601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 119 ways as a sum of consecutive naturals, for example, 1567714 + ... + 1567796.

It is an arithmetic number, because the mean of its divisors is an integer number (2317392).

Almost surely, 2^130123665 is an apocalyptic number.

130123665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

130123665 is an abundant number, since it is smaller than the sum of its proper divisors (147963375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130123665 is an equidigital number, since it uses as much as digits as its factorization.

130123665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 130123665 is about 11407.1760309027. The cubic root of 130123665 is about 506.7402822303.

Adding to 130123665 its reverse (566321031), we get a palindrome (696444696).

The spelling of 130123665 in words is "one hundred thirty million, one hundred twenty-three thousand, six hundred sixty-five".