1242052423 has 4 divisors (see below), whose sum is σ = 1244770720. Its totient is φ = 1239334128.

The previous prime is 1242052393. The next prime is 1242052429. The reversal of 1242052423 is 3242502421.

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 1242052423 - 2⁵ = 1242052391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242052429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358463 + ... + 1359376.

It is an arithmetic number, because the mean of its divisors is an integer number (311192680).

Almost surely, 2^1242052423 is an apocalyptic number.

1242052423 is a deficient number, since it is larger than the sum of its proper divisors (2718297).

1242052423 is an equidigital number, since it uses as much as digits as its factorization.

1242052423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718296.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1242052423 is about 35242.7641225827. The cubic root of 1242052423 is about 1074.9294846120.

Adding to 1242052423 its reverse (3242502421), we get a palindrome (4484554844).

The spelling of 1242052423 in words is "one billion, two hundred forty-two million, fifty-two thousand, four hundred twenty-three".