1131806141 has 2 divisors, whose sum is σ = 1131806142. Its totient is φ = 1131806140.

The previous prime is 1131806129. The next prime is 1131806167. The reversal of 1131806141 is 1416081311.

It is a happy number.

It is an a-pointer prime, because the next prime (1131806167) can be obtained adding 1131806141 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877403641 + 254402500 = 29621^2 + 15950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131806141 - 2⁶ = 1131806077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131806141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131806111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565903070 + 565903071.

It is an arithmetic number, because the mean of its divisors is an integer number (565903071).

Almost surely, 2^1131806141 is an apocalyptic number.

It is an amenable number.

1131806141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131806141 is an equidigital number, since it uses as much as digits as its factorization.

1131806141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1131806141 is about 33642.3266288169. The cubic root of 1131806141 is about 1042.1350802932.

Adding to 1131806141 its reverse (1416081311), we get a palindrome (2547887452).

The spelling of 1131806141 in words is "one billion, one hundred thirty-one million, eight hundred six thousand, one hundred forty-one".