1142320131 has 16 divisors (see below), whose sum is σ = 1705249920. Its totient is φ = 755731080.

The previous prime is 1142320103. The next prime is 1142320159. The reversal of 1142320131 is 1310232411.

1142320131 is a `hidden beast` number, since 11 + 423 + 201 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (1142320103) and next prime (1142320159).

It is a de Polignac number, because none of the positive numbers 2^k-1142320131 is a prime.

It is a super-2 number, since 2×1142320131² = 2609790563375714322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157945 + ... + 165018.

It is an arithmetic number, because the mean of its divisors is an integer number (106578120).

Almost surely, 2^1142320131 is an apocalyptic number.

1142320131 is a deficient number, since it is larger than the sum of its proper divisors (562929789).

1142320131 is a wasteful number, since it uses less digits than its factorization.

1142320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323103 (or 323097 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1142320131 is about 33798.2267434255. The cubic root of 1142320131 is about 1045.3521339474.

Adding to 1142320131 its reverse (1310232411), we get a palindrome (2452552542).

The spelling of 1142320131 in words is "one billion, one hundred forty-two million, three hundred twenty thousand, one hundred thirty-one".