1143720137 has 16 divisors (see below), whose sum is σ = 1347919872. Its totient is φ = 950130000.

The previous prime is 1143720131. The next prime is 1143720139. The reversal of 1143720137 is 7310273411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1143720137 - 2⁶ = 1143720073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143720131) 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 15 ways as a sum of consecutive naturals, for example, 17012 + ... + 50762.

It is an arithmetic number, because the mean of its divisors is an integer number (84244992).

Almost surely, 2^1143720137 is an apocalyptic number.

It is an amenable number.

1143720137 is a deficient number, since it is larger than the sum of its proper divisors (204199735).

1143720137 is a wasteful number, since it uses less digits than its factorization.

1143720137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33908.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 1143720137 is about 33818.9316359935. The cubic root of 1143720137 is about 1045.7790142201.

Adding to 1143720137 its reverse (7310273411), we get a palindrome (8453993548).

The spelling of 1143720137 in words is "one billion, one hundred forty-three million, seven hundred twenty thousand, one hundred thirty-seven".