1243320242 has 16 divisors (see below), whose sum is σ = 1883091672. Its totient is φ = 615632640.

The previous prime is 1243320241. The next prime is 1243320251. The reversal of 1243320242 is 2420233421.

It can be written as a sum of positive squares in 4 ways, for example, as 815616481 + 427703761 = 28559^2 + 20681^2 .

It is not an unprimeable number, because it can be changed into a prime (1243320241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500708 + ... + 503184.

Almost surely, 2^1243320242 is an apocalyptic number.

1243320242 is a deficient number, since it is larger than the sum of its proper divisors (639771430).

1243320242 is a wasteful number, since it uses less digits than its factorization.

1243320242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1243320242 is about 35260.7464753655. The cubic root of 1243320242 is about 1075.2951032622.

Adding to 1243320242 its reverse (2420233421), we get a palindrome (3663553663).

The spelling of 1243320242 in words is "one billion, two hundred forty-three million, three hundred twenty thousand, two hundred forty-two".