1142581838 has 8 divisors (see below), whose sum is σ = 1737350688. Its totient is φ = 563464944.

The previous prime is 1142581837. The next prime is 1142581861. The reversal of 1142581838 is 8381852411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1142581795 and 1142581804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142581831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3912806 + ... + 3913097.

It is an arithmetic number, because the mean of its divisors is an integer number (217168836).

Almost surely, 2^1142581838 is an apocalyptic number.

1142581838 is a deficient number, since it is larger than the sum of its proper divisors (594768850).

1142581838 is an equidigital number, since it uses as much as digits as its factorization.

1142581838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825978.

The product of its digits is 61440, while the sum is 41.

The square root of 1142581838 is about 33802.0981301457. The cubic root of 1142581838 is about 1045.4319583544.

The spelling of 1142581838 in words is "one billion, one hundred forty-two million, five hundred eighty-one thousand, eight hundred thirty-eight".