1242131423 has 8 divisors (see below), whose sum is σ = 1341958128. Its totient is φ = 1142915904.

The previous prime is 1242131419. The next prime is 1242131447. The reversal of 1242131423 is 3241312421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242131423 - 2² = 1242131419 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 (1242131923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148565 + ... + 156702.

It is an arithmetic number, because the mean of its divisors is an integer number (167744766).

Almost surely, 2^1242131423 is an apocalyptic number.

1242131423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1242131423 is a deficient number, since it is larger than the sum of its proper divisors (99826705).

1242131423 is a wasteful number, since it uses less digits than its factorization.

1242131423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305593.

The product of its digits is 1152, while the sum is 23.

The square root of 1242131423 is about 35243.8849022068. The cubic root of 1242131423 is about 1074.9522742107.

Adding to 1242131423 its reverse (3241312421), we get a palindrome (4483443844).

The spelling of 1242131423 in words is "one billion, two hundred forty-two million, one hundred thirty-one thousand, four hundred twenty-three".