123421125 has 16 divisors (see below), whose sum is σ = 205373376. Its totient is φ = 65824400.

The previous prime is 123421121. The next prime is 123421171. The reversal of 123421125 is 521124321.

It is not a de Polignac number, because 123421125 - 2² = 123421121 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164187 + ... + 164936.

It is an arithmetic number, because the mean of its divisors is an integer number (12835836).

Almost surely, 2^123421125 is an apocalyptic number.

123421125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123421125 is a deficient number, since it is larger than the sum of its proper divisors (81952251).

123421125 is an equidigital number, since it uses as much as digits as its factorization.

123421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329141 (or 329131 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 123421125 is about 11109.5060646277. The cubic root of 123421125 is about 497.8859071545.

Adding to 123421125 its reverse (521124321), we get a palindrome (644545446).

The spelling of 123421125 in words is "one hundred twenty-three million, four hundred twenty-one thousand, one hundred twenty-five".