123040424 has 32 divisors (see below), whose sum is σ = 263065320. Its totient is φ = 53446656.

The previous prime is 123040403. The next prime is 123040427. The reversal of 123040424 is 424040321.

It can be written as a sum of positive squares in 4 ways, for example, as 73788100 + 49252324 = 8590^2 + 7018^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123040396 and 123040405.

It is not an unprimeable number, because it can be changed into a prime (123040427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33029 + ... + 36564.

Almost surely, 2^123040424 is an apocalyptic number.

It is an amenable number.

123040424 is an abundant number, since it is smaller than the sum of its proper divisors (140024896).

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

123040424 is a wasteful number, since it uses less digits than its factorization.

123040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69629 (or 69625 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 123040424 is about 11092.3588113620. The cubic root of 123040424 is about 497.3734587215.

Adding to 123040424 its reverse (424040321), we get a palindrome (547080745).

The spelling of 123040424 in words is "one hundred twenty-three million, forty thousand, four hundred twenty-four".