1243131242 has 8 divisors (see below), whose sum is σ = 1883920836. Its totient is φ = 615157632.

The previous prime is 1243131203. The next prime is 1243131257. The reversal of 1243131242 is 2421313421.

It can be written as a sum of positive squares in 2 ways, for example, as 1185356041 + 57775201 = 34429^2 + 7601^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3203753 + ... + 3204140.

Almost surely, 2^1243131242 is an apocalyptic number.

1243131242 is a deficient number, since it is larger than the sum of its proper divisors (640789594).

1243131242 is an equidigital number, since it uses as much as digits as its factorization.

1243131242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407992.

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

The square root of 1243131242 is about 35258.0663394917. The cubic root of 1243131242 is about 1075.2406144651.

Adding to 1243131242 its reverse (2421313421), we get a palindrome (3664444663).

The spelling of 1243131242 in words is "one billion, two hundred forty-three million, one hundred thirty-one thousand, two hundred forty-two".