123502240 has 24 divisors (see below), whose sum is σ = 291774420. Its totient is φ = 49400832.

The previous prime is 123502237. The next prime is 123502241. The reversal of 123502240 is 42205321.

It can be written as a sum of positive squares in 2 ways, for example, as 122677776 + 824464 = 11076^2 + 908^2 .

It is not an unprimeable number, because it can be changed into a prime (123502241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385785 + ... + 386104.

Almost surely, 2^123502240 is an apocalyptic number.

123502240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123502240 is an abundant number, since it is smaller than the sum of its proper divisors (168272180).

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

123502240 is an equidigital number, since it uses as much as digits as its factorization.

123502240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771904 (or 771896 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 123502240 is about 11113.1561673541. The cubic root of 123502240 is about 497.9949570195.

Adding to 123502240 its reverse (42205321), we get a palindrome (165707561).

The spelling of 123502240 in words is "one hundred twenty-three million, five hundred two thousand, two hundred forty".