1020142044 has 72 divisors (see below), whose sum is σ = 2623176192. Its totient is φ = 334225440.

The previous prime is 1020142027. The next prime is 1020142049. The reversal of 1020142044 is 4402410201.

1020142044 is a `hidden beast` number, since 1 + 0 + 201 + 420 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020142049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665559 + ... + 667089.

Almost surely, 2^1020142044 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 1020142044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1311588096).

1020142044 is an abundant number, since it is smaller than the sum of its proper divisors (1603034148).

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

1020142044 is a wasteful number, since it uses less digits than its factorization.

1020142044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1020142044 is about 31939.6625530077. The cubic root of 1020142044 is about 1006.6694344227.

Adding to 1020142044 its reverse (4402410201), we get a palindrome (5422552245).

The spelling of 1020142044 in words is "one billion, twenty million, one hundred forty-two thousand, forty-four".