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130123 = 729641
BaseRepresentation
bin11111110001001011
320121111101
4133301023
513130443
62442231
71051240
oct376113
9217441
10130123
1189844
1263377
13472c6
14355c7
152884d
hex1fc4b

130123 has 8 divisors (see below), whose sum is σ = 154080. Its totient is φ = 107520.

The previous prime is 130121. The next prime is 130127. The reversal of 130123 is 321031.

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

It is not a de Polignac number, because 130123 - 21 = 130121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (19260).

2130123 is an apocalyptic number.

130123 is a deficient number, since it is larger than the sum of its proper divisors (23957).

130123 is an equidigital number, since it uses as much as digits as its factorization.

130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 130123 is about 360.7256575294. The cubic root of 130123 is about 50.6739418993.

Adding to 130123 its reverse (321031), we get a palindrome (451154).

It can be divided in two parts, 130 and 123, that added together give a triangular number (253 = T22).

The spelling of 130123 in words is "one hundred thirty thousand, one hundred twenty-three".

Divisors: 1 7 29 203 641 4487 18589 130123