1142142440 has 32 divisors (see below), whose sum is σ = 2705076000. Its totient is φ = 432811584.

The previous prime is 1142142427. The next prime is 1142142493. The reversal of 1142142440 is 442412411.

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, 750650 + ... + 752169.

It is an arithmetic number, because the mean of its divisors is an integer number (84533625).

Almost surely, 2^1142142440 is an apocalyptic number.

1142142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142142440 is an abundant number, since it is smaller than the sum of its proper divisors (1562933560).

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

1142142440 is a wasteful number, since it uses less digits than its factorization.

1142142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502849 (or 1502845 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1142142440 is about 33795.5979381931. The cubic root of 1142142440 is about 1045.2979286818.

Adding to 1142142440 its reverse (442412411), we get a palindrome (1584554851).

The spelling of 1142142440 in words is "one billion, one hundred forty-two million, one hundred forty-two thousand, four hundred forty".