1240424123 has 4 divisors (see below), whose sum is σ = 1240795248. Its totient is φ = 1240053000.

The previous prime is 1240424117. The next prime is 1240424147. The reversal of 1240424123 is 3214240421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1240424123 - 2²⁶ = 1173315259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240424153) 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, 180503 + ... + 187248.

It is an arithmetic number, because the mean of its divisors is an integer number (310198812).

Almost surely, 2^1240424123 is an apocalyptic number.

1240424123 is a deficient number, since it is larger than the sum of its proper divisors (371125).

1240424123 is an equidigital number, since it uses as much as digits as its factorization.

1240424123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371124.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1240424123 is about 35219.6553503864. The cubic root of 1240424123 is about 1074.4595438712.

Adding to 1240424123 its reverse (3214240421), we get a palindrome (4454664544).

The spelling of 1240424123 in words is "one billion, two hundred forty million, four hundred twenty-four thousand, one hundred twenty-three".