1243202242 has 4 divisors (see below), whose sum is σ = 1864803366. Its totient is φ = 621601120.

The previous prime is 1243202227. The next prime is 1243202273. The reversal of 1243202242 is 2422023421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2422023421 = 29 ⋅83518049.

It can be written as a sum of positive squares in only one way, i.e., 730134441 + 513067801 = 27021^2 + 22651^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310800559 + ... + 310800562.

Almost surely, 2^1243202242 is an apocalyptic number.

1243202242 is a deficient number, since it is larger than the sum of its proper divisors (621601124).

1243202242 is an equidigital number, since it uses as much as digits as its factorization.

1243202242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621601123.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1243202242 is about 35259.0731869118. The cubic root of 1243202242 is about 1075.2610844492.

Adding to 1243202242 its reverse (2422023421), we get a palindrome (3665225663).

The spelling of 1243202242 in words is "one billion, two hundred forty-three million, two hundred two thousand, two hundred forty-two".