1243653122 has 24 divisors (see below), whose sum is σ = 1988932656. Its totient is φ = 583103808.

The previous prime is 1243653121. The next prime is 1243653137. The reversal of 1243653122 is 2213563421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1243653121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159773 + ... + 167375.

It is an arithmetic number, because the mean of its divisors is an integer number (82872194).

Almost surely, 2^1243653122 is an apocalyptic number.

1243653122 is a deficient number, since it is larger than the sum of its proper divisors (745279534).

1243653122 is a wasteful number, since it uses less digits than its factorization.

1243653122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922 (or 7905 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1243653122 is about 35265.4664225500. The cubic root of 1243653122 is about 1075.3910593112.

The spelling of 1243653122 in words is "one billion, two hundred forty-three million, six hundred fifty-three thousand, one hundred twenty-two".