1243252222 has 4 divisors (see below), whose sum is σ = 1864878336. Its totient is φ = 621626110.

The previous prime is 1243252193. The next prime is 1243252229. The reversal of 1243252222 is 2222523421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2222523421 = 2789 ⋅796889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243252229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310813054 + ... + 310813057.

It is an arithmetic number, because the mean of its divisors is an integer number (466219584).

Almost surely, 2^1243252222 is an apocalyptic number.

1243252222 is a deficient number, since it is larger than the sum of its proper divisors (621626114).

1243252222 is an equidigital number, since it uses as much as digits as its factorization.

1243252222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621626113.

The product of its digits is 3840, while the sum is 25.

The square root of 1243252222 is about 35259.7819335287. The cubic root of 1243252222 is about 1075.2754936973.

Adding to 1243252222 its reverse (2222523421), we get a palindrome (3465775643).

The spelling of 1243252222 in words is "one billion, two hundred forty-three million, two hundred fifty-two thousand, two hundred twenty-two".