1142778571 has 12 divisors (see below), whose sum is σ = 1257184096. Its totient is φ = 1038003120.

The previous prime is 1142778551. The next prime is 1142778577. The reversal of 1142778571 is 1758772411.

It is not a de Polignac number, because 1142778571 - 2¹⁹ = 1142254283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142778577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168865 + ... + 175501.

Almost surely, 2^1142778571 is an apocalyptic number.

1142778571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1142778571 is a deficient number, since it is larger than the sum of its proper divisors (114405525).

1142778571 is a wasteful number, since it uses less digits than its factorization.

1142778571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082 (or 8071 counting only the distinct ones).

The product of its digits is 109760, while the sum is 43.

The square root of 1142778571 is about 33805.0080757275. The cubic root of 1142778571 is about 1045.4919567299.

It can be divided in two parts, 11427 and 78571, that added together give a palindrome (89998).

The spelling of 1142778571 in words is "one billion, one hundred forty-two million, seven hundred seventy-eight thousand, five hundred seventy-one".