1142505438 has 16 divisors (see below), whose sum is σ = 2286884880. Its totient is φ = 380522816.

The previous prime is 1142505437. The next prime is 1142505457. The reversal of 1142505438 is 8345052411.

It is a junction number, because it is equal to n+sod(n) for n = 1142505399 and 1142505408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142505437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70095 + ... + 84842.

It is an arithmetic number, because the mean of its divisors is an integer number (142930305).

Almost surely, 2^1142505438 is an apocalyptic number.

1142505438 is an abundant number, since it is smaller than the sum of its proper divisors (1144379442).

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

1142505438 is a wasteful number, since it uses less digits than its factorization.

1142505438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156171.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 1142505438 is about 33800.9680038901. The cubic root of 1142505438 is about 1045.4086565131.

Adding to 1142505438 its reverse (8345052411), we get a palindrome (9487557849).

The spelling of 1142505438 in words is "one billion, one hundred forty-two million, five hundred five thousand, four hundred thirty-eight".