123231420 has 108 divisors (see below), whose sum is σ = 404867736. Its totient is φ = 30326400.

The previous prime is 123231403. The next prime is 123231431. The reversal of 123231420 is 24132321.

123231420 is a `hidden beast` number, since 12 + 3 + 231 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123231393 and 123231402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28395 + ... + 32445.

Almost surely, 2^123231420 is an apocalyptic number.

123231420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123231420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202433868).

123231420 is an abundant number, since it is smaller than the sum of its proper divisors (281636316).

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

123231420 is a wasteful number, since it uses less digits than its factorization.

123231420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092 (or 4074 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123231420 is about 11100.9648229332. The cubic root of 123231420 is about 497.6306837484.

Adding to 123231420 its reverse (24132321), we get a palindrome (147363741).

Subtracting from 123231420 its reverse (24132321), we obtain a palindrome (99099099).

The spelling of 123231420 in words is "one hundred twenty-three million, two hundred thirty-one thousand, four hundred twenty".