1142147186 has 4 divisors (see below), whose sum is σ = 1713220782. Its totient is φ = 571073592.

The previous prime is 1142147131. The next prime is 1142147213. The reversal of 1142147186 is 6817412411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6817412411 = 821 ⋅8303791.

It can be written as a sum of positive squares in only one way, i.e., 1133332225 + 8814961 = 33665^2 + 2969^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285536795 + ... + 285536798.

Almost surely, 2^1142147186 is an apocalyptic number.

1142147186 is a deficient number, since it is larger than the sum of its proper divisors (571073596).

1142147186 is an equidigital number, since it uses as much as digits as its factorization.

1142147186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571073595.

The product of its digits is 10752, while the sum is 35.

The square root of 1142147186 is about 33795.6681543656. The cubic root of 1142147186 is about 1045.2993765389.

Adding to 1142147186 its reverse (6817412411), we get a palindrome (7959559597).

The spelling of 1142147186 in words is "one billion, one hundred forty-two million, one hundred forty-seven thousand, one hundred eighty-six".