123432420 has 48 divisors (see below), whose sum is σ = 346788288. Its totient is φ = 32803200.

The previous prime is 123432401. The next prime is 123432433. The reversal of 123432420 is 24234321.

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 15 ways as a sum of consecutive naturals, for example, 15070 + ... + 21770.

It is an arithmetic number, because the mean of its divisors is an integer number (7224756).

Almost surely, 2^123432420 is an apocalyptic number.

123432420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123432420 is an abundant number, since it is smaller than the sum of its proper divisors (223355868).

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

123432420 is a wasteful number, since it uses less digits than its factorization.

123432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020 (or 7018 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123432420 is about 11110.0144014308. The cubic root of 123432420 is about 497.9010948564.

Adding to 123432420 its reverse (24234321), we get a palindrome (147666741).

The spelling of 123432420 in words is "one hundred twenty-three million, four hundred thirty-two thousand, four hundred twenty".