123810130 has 16 divisors (see below), whose sum is σ = 223037784. Its totient is φ = 49484160.

The previous prime is 123810109. The next prime is 123810131. The reversal of 123810130 is 31018321.

It is a Cunningham number, because it is equal to 11127²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 120758121 + 3052009 = 10989^2 + 1747^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123810098 and 123810107.

It is not an unprimeable number, because it can be changed into a prime (123810131) 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, 10270 + ... + 18790.

Almost surely, 2^123810130 is an apocalyptic number.

123810130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123810130 is a deficient number, since it is larger than the sum of its proper divisors (99227654).

123810130 is a wasteful number, since it uses less digits than its factorization.

123810130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9981.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 123810130 is about 11127.0000449357. Note that the first 4 decimals coincide. The cubic root of 123810130 is about 498.4084459534.

Adding to 123810130 its reverse (31018321), we get a palindrome (154828451).

The spelling of 123810130 in words is "one hundred twenty-three million, eight hundred ten thousand, one hundred thirty".