240340123 has 4 divisors (see below), whose sum is σ = 246835840. Its totient is φ = 233844408.

The previous prime is 240340091. The next prime is 240340127. The reversal of 240340123 is 321043042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321043042 = 2 ⋅160521521.

It is a cyclic number.

It is not a de Polignac number, because 240340123 - 2⁵ = 240340091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240340123.

It is not an unprimeable number, because it can be changed into a prime (240340127) 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, 3247803 + ... + 3247876.

It is an arithmetic number, because the mean of its divisors is an integer number (61708960).

Almost surely, 2^240340123 is an apocalyptic number.

240340123 is a deficient number, since it is larger than the sum of its proper divisors (6495717).

240340123 is an equidigital number, since it uses as much as digits as its factorization.

240340123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6495716.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240340123 is about 15502.9069209616. The cubic root of 240340123 is about 621.7399296324.

Adding to 240340123 its reverse (321043042), we get a palindrome (561383165).

It can be divided in two parts, 24034012 and 3, that multiplied together give a triangular number (72102036 = T₁₂₀₀₈).

The spelling of 240340123 in words is "two hundred forty million, three hundred forty thousand, one hundred twenty-three".