1243230242 has 4 divisors (see below), whose sum is σ = 1864845366. Its totient is φ = 621615120.

The previous prime is 1243230239. The next prime is 1243230253. The reversal of 1243230242 is 2420323421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1227871681 + 15358561 = 35041^2 + 3919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310807559 + ... + 310807562.

Almost surely, 2^1243230242 is an apocalyptic number.

1243230242 is a deficient number, since it is larger than the sum of its proper divisors (621615124).

1243230242 is an equidigital number, since it uses as much as digits as its factorization.

1243230242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621615123.

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

The square root of 1243230242 is about 35259.4702455950. The cubic root of 1243230242 is about 1075.2691569047.

Adding to 1243230242 its reverse (2420323421), we get a palindrome (3663553663).

The spelling of 1243230242 in words is "one billion, two hundred forty-three million, two hundred thirty thousand, two hundred forty-two".