1142044420 has 48 divisors (see below), whose sum is σ = 2618997696. Its totient is φ = 414864000.

The previous prime is 1142044403. The next prime is 1142044427. The reversal of 1142044420 is 244402411.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1142044391 and 1142044400.

It is not an unprimeable number, because it can be changed into a prime (1142044427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282010 + ... + 286030.

It is an arithmetic number, because the mean of its divisors is an integer number (54562452).

Almost surely, 2^1142044420 is an apocalyptic number.

1142044420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142044420 is an abundant number, since it is smaller than the sum of its proper divisors (1476953276).

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

1142044420 is a wasteful number, since it uses less digits than its factorization.

1142044420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332 (or 5330 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1142044420 is about 33794.1477182071. The cubic root of 1142044420 is about 1045.2680249294.

Adding to 1142044420 its reverse (244402411), we get a palindrome (1386446831).

The spelling of 1142044420 in words is "one billion, one hundred forty-two million, forty-four thousand, four hundred twenty".