1142744856 has 32 divisors (see below), whose sum is σ = 3116577600. Its totient is φ = 346286240.

The previous prime is 1142744849. The next prime is 1142744861. The reversal of 1142744856 is 6584472411.

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, 2164026 + ... + 2164553.

It is an arithmetic number, because the mean of its divisors is an integer number (97393050).

Almost surely, 2^1142744856 is an apocalyptic number.

It is an amenable number.

1142744856 is an abundant number, since it is smaller than the sum of its proper divisors (1973832744).

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

1142744856 is a wasteful number, since it uses less digits than its factorization.

1142744856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328599 (or 4328595 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 1142744856 is about 33804.5094033326. The cubic root of 1142744856 is about 1045.4816750332.

The spelling of 1142744856 in words is "one billion, one hundred forty-two million, seven hundred forty-four thousand, eight hundred fifty-six".