1243745742 has 16 divisors (see below), whose sum is σ = 2548162512. Its totient is φ = 404470080.

The previous prime is 1243745731. The next prime is 1243745759. The reversal of 1243745742 is 2475473421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243745742.

It is a congruent number.

It is an unprimeable number.

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, 2527693 + ... + 2528184.

It is an arithmetic number, because the mean of its divisors is an integer number (159260157).

Almost surely, 2^1243745742 is an apocalyptic number.

1243745742 is an abundant number, since it is smaller than the sum of its proper divisors (1304416770).

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

1243745742 is a wasteful number, since it uses less digits than its factorization.

1243745742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055923.

The product of its digits is 188160, while the sum is 39.

The square root of 1243745742 is about 35266.7795807896. The cubic root of 1243745742 is about 1075.4177549242.

The spelling of 1243745742 in words is "one billion, two hundred forty-three million, seven hundred forty-five thousand, seven hundred forty-two".