1243744122 has 16 divisors (see below), whose sum is σ = 2554718112. Its totient is φ = 403376400.

The previous prime is 1243744121. The next prime is 1243744129. The reversal of 1243744122 is 2214473421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243744122.

It is not an unprimeable number, because it can be changed into a prime (1243744121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801004 + ... + 2801447.

It is an arithmetic number, because the mean of its divisors is an integer number (159669882).

Almost surely, 2^1243744122 is an apocalyptic number.

1243744122 is an abundant number, since it is smaller than the sum of its proper divisors (1310973990).

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

1243744122 is a wasteful number, since it uses less digits than its factorization.

1243744122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5602493.

The product of its digits is 10752, while the sum is 30.

The square root of 1243744122 is about 35266.7566129918. The cubic root of 1243744122 is about 1075.4172880073.

The spelling of 1243744122 in words is "one billion, two hundred forty-three million, seven hundred forty-four thousand, one hundred twenty-two".