123130434 has 24 divisors (see below), whose sum is σ = 286467408. Its totient is φ = 35180040.

The previous prime is 123130379. The next prime is 123130451. The reversal of 123130434 is 434031321.

It is a super-2 number, since 2×123130434² = 30322207554056712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 123130434.

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 11 ways as a sum of consecutive naturals, for example, 209112 + ... + 209699.

It is an arithmetic number, because the mean of its divisors is an integer number (11936142).

Almost surely, 2^123130434 is an apocalyptic number.

123130434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123130434 is an abundant number, since it is smaller than the sum of its proper divisors (163336974).

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

123130434 is a wasteful number, since it uses less digits than its factorization.

123130434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418830 (or 418823 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123130434 is about 11096.4153671355. The cubic root of 123130434 is about 497.4947133770.

Adding to 123130434 its reverse (434031321), we get a palindrome (557161755).

The spelling of 123130434 in words is "one hundred twenty-three million, one hundred thirty thousand, four hundred thirty-four".