123120240 has 40 divisors (see below), whose sum is σ = 381673488. Its totient is φ = 32832000.

The previous prime is 123120227. The next prime is 123120241. The reversal of 123120240 is 42021321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120241) 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, 256261 + ... + 256740.

Almost surely, 2^123120240 is an apocalyptic number.

123120240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123120240 is an abundant number, since it is smaller than the sum of its proper divisors (258553248).

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

123120240 is a wasteful number, since it uses less digits than its factorization.

123120240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513017 (or 513011 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 123120240 is about 11095.9560201003. The cubic root of 123120240 is about 497.4809837601.

Adding to 123120240 its reverse (42021321), we get a palindrome (165141561).

The spelling of 123120240 in words is "one hundred twenty-three million, one hundred twenty thousand, two hundred forty".