123320420 has 24 divisors (see below), whose sum is σ = 261353400. Its totient is φ = 48874752.

The previous prime is 123320381. The next prime is 123320459. The reversal of 123320420 is 24023321.

It is an interprime number because it is at equal distance from previous prime (123320381) and next prime (123320459).

It can be written as a sum of positive squares in 4 ways, for example, as 55026724 + 68293696 = 7418^2 + 8264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26105 + ... + 30464.

It is an arithmetic number, because the mean of its divisors is an integer number (10889725).

Almost surely, 2^123320420 is an apocalyptic number.

123320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123320420 is an abundant number, since it is smaller than the sum of its proper divisors (138032980).

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

123320420 is a wasteful number, since it uses less digits than its factorization.

123320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56687 (or 56685 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123320420 is about 11104.9727599846. The cubic root of 123320420 is about 497.7504542663.

Adding to 123320420 its reverse (24023321), we get a palindrome (147343741).

The spelling of 123320420 in words is "one hundred twenty-three million, three hundred twenty thousand, four hundred twenty".