123115040 has 24 divisors (see below), whose sum is σ = 290859660. Its totient is φ = 49245952.

The previous prime is 123115033. The next prime is 123115049. The reversal of 123115040 is 40511321.

It can be written as a sum of positive squares in 2 ways, for example, as 115519504 + 7595536 = 10748^2 + 2756^2 .

It is not an unprimeable number, because it can be changed into a prime (123115049) 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, 384575 + ... + 384894.

Almost surely, 2^123115040 is an apocalyptic number.

123115040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123115040 is an abundant number, since it is smaller than the sum of its proper divisors (167744620).

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

123115040 is an equidigital number, since it uses as much as digits as its factorization.

123115040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769484 (or 769476 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 123115040 is about 11095.7216980240. The cubic root of 123115040 is about 497.4739799359.

Adding to 123115040 its reverse (40511321), we get a palindrome (163626361).

The spelling of 123115040 in words is "one hundred twenty-three million, one hundred fifteen thousand, forty".