1242112393 has 4 divisors (see below), whose sum is σ = 1242183748. Its totient is φ = 1242041040.

The previous prime is 1242112387. The next prime is 1242112409. The reversal of 1242112393 is 3932112421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 285880464 + 956231929 = 16908^2 + 30923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242112393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242112693) 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, 9523 + ... + 50743.

It is an arithmetic number, because the mean of its divisors is an integer number (310545937).

Almost surely, 2^1242112393 is an apocalyptic number.

It is an amenable number.

1242112393 is a deficient number, since it is larger than the sum of its proper divisors (71355).

1242112393 is an equidigital number, since it uses as much as digits as its factorization.

1242112393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71354.

The product of its digits is 2592, while the sum is 28.

The square root of 1242112393 is about 35243.6149252599. The cubic root of 1242112393 is about 1074.9467846021.

Adding to 1242112393 its sum of digits (28), we get a palindrome (1242112421).

The spelling of 1242112393 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, three hundred ninety-three".