1243240242 has 8 divisors (see below), whose sum is σ = 2486480496. Its totient is φ = 414413412.

The previous prime is 1243240217. The next prime is 1243240247. The reversal of 1243240242 is 2420423421.

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

1243240242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1243240247) 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, 103603348 + ... + 103603359.

It is an arithmetic number, because the mean of its divisors is an integer number (310810062).

Almost surely, 2^1243240242 is an apocalyptic number.

1243240242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243240242 is a wasteful number, since it uses less digits than its factorization.

1243240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207206712.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1243240242 is about 35259.6120511840. The cubic root of 1243240242 is about 1075.2720398951.

Adding to 1243240242 its reverse (2420423421), we get a palindrome (3663663663).

The spelling of 1243240242 in words is "one billion, two hundred forty-three million, two hundred forty thousand, two hundred forty-two".