123402130 has 16 divisors (see below), whose sum is σ = 231781824. Its totient is φ = 47214640.

The previous prime is 123402127. The next prime is 123402173. The reversal of 123402130 is 31204321.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268036 + ... + 268495.

It is an arithmetic number, because the mean of its divisors is an integer number (14486364).

Almost surely, 2^123402130 is an apocalyptic number.

123402130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123402130 is a deficient number, since it is larger than the sum of its proper divisors (108379694).

123402130 is a wasteful number, since it uses less digits than its factorization.

123402130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536561.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123402130 is about 11108.6511332385. The cubic root of 123402130 is about 497.8603636396.

Adding to 123402130 its reverse (31204321), we get a palindrome (154606451).

The spelling of 123402130 in words is "one hundred twenty-three million, four hundred two thousand, one hundred thirty".