1142000644 has 6 divisors (see below), whose sum is σ = 1998501134. Its totient is φ = 571000320.

The previous prime is 1142000641. The next prime is 1142000663. The reversal of 1142000644 is 4460002411.

It can be written as a sum of positive squares in only one way, i.e., 735494400 + 406506244 = 27120^2 + 20162^2 .

It is not an unprimeable number, because it can be changed into a prime (1142000641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142750077 + ... + 142750084.

Almost surely, 2^1142000644 is an apocalyptic number.

It is an amenable number.

1142000644 is a deficient number, since it is larger than the sum of its proper divisors (856500490).

1142000644 is a wasteful number, since it uses less digits than its factorization.

1142000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285500165 (or 285500163 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1142000644 is about 33793.5000258926. The cubic root of 1142000644 is about 1045.2546692791.

The spelling of 1142000644 in words is "one billion, one hundred forty-two million, six hundred forty-four", and thus it is an aban number.