1142188056 has 96 divisors (see below), whose sum is σ = 3203740800. Its totient is φ = 367234560.

The previous prime is 1142188049. The next prime is 1142188063. The reversal of 1142188056 is 6508812411.

It is an interprime number because it is at equal distance from previous prime (1142188049) and next prime (1142188063).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1142188056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 885460 + ... + 886748.

It is an arithmetic number, because the mean of its divisors is an integer number (33372300).

Almost surely, 2^1142188056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142188056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601870400).

1142188056 is an abundant number, since it is smaller than the sum of its proper divisors (2061552744).

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

1142188056 is a wasteful number, since it uses less digits than its factorization.

1142188056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1142188056 is about 33796.2728122496. The cubic root of 1142188056 is about 1045.3118445397.

The spelling of 1142188056 in words is "one billion, one hundred forty-two million, one hundred eighty-eight thousand, fifty-six".