1142978156 has 24 divisors (see below), whose sum is σ = 2065168896. Its totient is φ = 553150080.

The previous prime is 1142978147. The next prime is 1142978171. The reversal of 1142978156 is 6518792411.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6611 + ... + 48266.

It is an arithmetic number, because the mean of its divisors is an integer number (86048704).

Almost surely, 2^1142978156 is an apocalyptic number.

It is an amenable number.

1142978156 is a deficient number, since it is larger than the sum of its proper divisors (922190740).

1142978156 is a wasteful number, since it uses less digits than its factorization.

1142978156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55049 (or 55047 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 1142978156 is about 33807.9599502839. The cubic root of 1142978156 is about 1045.5528178541.

The spelling of 1142978156 in words is "one billion, one hundred forty-two million, nine hundred seventy-eight thousand, one hundred fifty-six".